Open-source alternatives to Abap Cheat Sheets

This project is a web application security standard and vulnerability framework. It provides a comprehensive list of the most critical security risks facing web applications, paired with technical guidance and a structured methodology for identifying and mitigating these flaws. The framework functions as a secure coding guide and a risk assessment methodology, offering a standardized approach to prioritizing vulnerabilities based on their potential impact and likelihood of exploitation. It defines architectural patterns and technical recommendations to help developers implement defense in dep

Action Policy is a Ruby authorization framework designed to manage user access and permissions by encapsulating security logic into dedicated policy classes. It provides a structured system for defining access rules that evaluate user actions against specific application resources, ensuring that security logic remains decoupled from the primary application code. The framework distinguishes itself through its ability to handle complex authorization requirements across diverse interfaces, including web controllers and various API formats. It supports dynamic permission evaluation by utilizing a

This project is a curated collection of C code implementation libraries and reference materials designed for learning the C programming language. It serves as a technical reference and study guide, providing a set of verified code samples that demonstrate core syntax and software patterns. The repository functions as a low-level programming study guide, focusing on the analysis of concrete implementations to teach memory management and hardware interaction. It organizes these materials into a modular structure, separating different language concepts into discrete files to facilitate the study

Hazelcast is a distributed data platform that combines an in-memory data grid with a stream processing engine to support real-time analytics and event-driven applications. It functions as a partitioned, distributed key-value store that replicates data across cluster nodes to provide low-latency access and high availability. The platform also serves as a distributed SQL query engine, allowing users to execute standard SQL statements against both in-memory datasets and external data sources. What distinguishes Hazelcast is its use of a distributed consensus subsystem to maintain strongly consis

Eve is a REST API framework that maps database collections to web resources through declarative configuration files. It functions as a database-to-API mapper, automatically exposing data as RESTful endpoints with built-in support for CRUD operations and schema-based request validation. The project distinguishes itself through a HATEOAS API engine that generates hypermedia links and resource schemas for dynamic client discovery. It also includes an automated Swagger documentation generator that produces interactive specifications for client SDK generation and testing. The framework provides a

This project is a library and software architecture guide focused on the implementation of classic design patterns in JavaScript. It provides a collection of concrete coding examples that translate theoretical architectural patterns into working code to improve software maintainability and scalability. The repository focuses on structural and behavioral patterns used to solve common software engineering problems. It offers a set of templates and standards for organizing complex logic and managing frontend code organization. The content covers broad capability areas including professional Jav

GraphQL-Ruby is a Ruby library for building GraphQL APIs with a strongly typed schema and a dedicated query execution engine. It provides a comprehensive framework for mapping application objects to a formal type system, enabling structured data fetching through defined resolvers. The project distinguishes itself with advanced performance and delivery mechanisms, including a data loader for batching and caching to prevent N+1 query patterns. It supports high-performance data delivery through incremental response streaming, deferred query responses, and parallel data fetching using fibers. Add

Hocuspocus is a backend framework designed to facilitate real-time collaborative editing and state synchronization in web applications. It functions as a server-side infrastructure that manages persistent WebSocket connections, enabling multiple users to edit shared documents simultaneously while maintaining data consistency through a conflict-free replicated data type engine. The platform distinguishes itself through a modular, middleware-driven architecture that allows developers to intercept document lifecycle events, enforce custom access control policies, and integrate external services.

This project provides a framework for managing multi-agent systems, designed to automate complex software development, infrastructure, and business workflows. It functions as a multi-agent workflow orchestrator that routes tasks to domain-specific workers while maintaining state persistence and infrastructure automation. By leveraging large language models, the system decomposes high-level objectives into actionable plans, ensuring that complex operations are executed with consistency and reliability. The framework distinguishes itself through its hierarchical agent registry and policy-driven

Quarkus is a Kubernetes-native Java framework designed for building high-performance, memory-efficient applications. It utilizes ahead-of-time native compilation to transform Java code into standalone, optimized binaries that eliminate the need for a virtual machine, enabling rapid startup and reduced memory consumption. By performing code augmentation during the build phase, it shifts heavy processing tasks away from runtime, ensuring that applications are optimized for cloud-native environments. The framework distinguishes itself through a unified approach to reactive and imperative program

Filament is a full-stack framework for building administrative panels and management interfaces within the Laravel ecosystem. It provides a declarative, component-based architecture that allows developers to construct complex, data-driven applications using server-side configuration objects rather than manual HTML. By inspecting database model structures and relationships, the framework automates the generation of CRUD interfaces, forms, and data tables, significantly reducing boilerplate code. The project distinguishes itself through a highly modular and extensible design that supports custo

This project is a comprehensive reference guide and cheat sheet for the Go programming language. It serves as a syntax reference and documentation collection designed for quick lookup of fundamental operators, core language features, and specific code patterns. The resource covers a wide range of technical domains, including Go concurrency primitives, software architecture patterns such as interface embedding, and standard error handling. It provides guides on implementing goroutines and channels to manage parallel execution and asynchronous tasks. The content is delivered as a static site g

This project is an ECMAScript 2015 reference guide and JavaScript language cheat sheet. It provides a concise summary of the language specifications, syntax updates, and new features introduced in the 2015 standard. The guide serves as a technical overview of modern language patterns used to manage modular code structures and asynchronous operations. It functions as a reference for implementing current coding standards and studying core updates to the language. The content covers a wide range of capabilities, including asynchronous programming, object modeling, and module management. It deta

This project is a Go language cheat sheet and technical reference designed for rapid lookup of syntax patterns and core language features. It serves as a concise programming guide to Go type systems, tokens, and standard programming constructs. The reference covers foundational areas of the language, including concurrency and parallelism through the use of channels and lightweight threads. It also details data modeling using structs and embedding, as well as the language's approach to explicit error handling via return values. Additional guidance is provided on Go application architecture an

javascript-in-one-pic is a visual reference guide and cheat sheet that provides a high-level graphical overview of the JavaScript programming language. It maps core syntax and fundamental building blocks into a single diagram to serve as a comprehensive language overview. The project functions as a syntax reference and learning tool, using programming language visualization to help users locate and review language rules in a condensed format. The guide is implemented as a resolution-independent SVG diagram that uses a grid-based hierarchical arrangement and visual-spatial mapping to illustra

This project is a collection of condensed technical references and study guides for the C++ language. It serves as a language cheat sheet and programming reference covering core syntax, standards, and data organization patterns. The resource provides specialized guides for algorithm study, data structure reference, and technical interview preparation. It includes materials for reviewing computational complexity and efficient data structure usage for competitive programming. The content covers broad capability areas including object-oriented programming, memory management, and generic program

jstips is a curated library of practical JavaScript patterns and concise coding shortcuts. It serves as a reference manual and programming guide for implementing best practices and optimized syntax patterns to write cleaner, more professional code. The project organizes technical knowledge through a collection of isolated, runnable code demonstrations and modular tip classifications. This example-driven approach allows for the discovery of modern language features and specific coding shortcuts without long-form prose. The repository covers areas of code optimization, performance tuning, and

This project is a collection of programming language references and syntax cheat sheets designed for rapid developer onboarding. It serves as a library of code-based documentation that uses valid source code files to provide whirlwind tours of various language specifications. The project focuses on programming language learning by providing concise, commented code examples that explain core features and syntax in place. This approach enables developers to quickly grasp language-specific patterns, data types, and execution flow through a consistent reference format. The content covers a broad

This project is a comprehensive collection of Python programming education materials, including tutorials, exercises, and curated code samples. It serves as a learning curriculum and software engineering toolkit, utilizing Jupyter Notebooks to combine executable code with descriptive educational text. The repository provides practical implementation guides for building large language model applications, such as retrieval-augmented generation systems, stateful AI agents, and machine learning workflows. It distinguishes itself by offering a structured approach to agentic coding workflows, cover

This project is a curated collection of technical cheat sheets and quick-reference guides designed to assist with daily software development tasks. It functions as a static knowledge base, providing concise summaries of programming language syntax, database query commands, and common software tool patterns. The repository organizes these technical notes as version-controlled markdown files, allowing for rapid access to essential information without the need for extensive documentation searches. By maintaining these references in a centralized, repository-driven format, the project helps reduc

This project is a Python 3 visual reference guide and language syntax map. It provides a condensed visual summary of core programming concepts, data types, and flow control structures designed for rapid technical lookup and education. The guide uses a vector-based technical illustration to ensure clarity across different zoom levels. It employs a spatial layout and coordinate-based syntax mapping to organize language rules and programming constructs into a single image, allowing for non-linear reference without searching through extensive technical documentation. The resource covers Python s

cheats.rs is a Rust syntax reference and technical documentation resource provided as a static site. It serves as a curated collection of examples and patterns designed to assist with Rust language learning. The project covers a wide range of language constructs, including memory management, the use of generics, and the implementation of asynchronous logic. It provides guidance on defining data structures, managing memory references, and organizing code modules. Additional coverage includes patterns for control flow, pattern matching, and the use of macros, as well as instructions for perfor

This project is a comprehensive collection of web development reference guides and technical cheat sheets. It provides a curated set of markdown-based documentation designed to help developers quickly locate syntax patterns and API examples for common web technologies and programming languages. The repository serves as a specialized reference library covering several distinct technical domains. It includes extensive guides for CSS, focusing on selectors, Flexbox, Grid, and responsive layout properties, as well as a DevOps command reference for Docker, Kubernetes, AWS, Ansible, and general she

Go42 is a comprehensive programming language guide and reference for the Go language. It serves as a study of the official language specifications and a collection of design patterns derived from the internal logic and source code of the Go standard library. The project focuses on analyzing official library implementations to demonstrate idiomatic design patterns and core architectural thinking. It maps high-level architectural patterns to specific language features to support the development of scalable and maintainable software. The educational material is organized through case studies an

This repository serves as a comprehensive educational resource for developers building applications within the Apple software ecosystem. It provides a structured guide to the Swift programming language, offering curated examples and documentation that cover core syntax, standard development practices, and foundational programming concepts. The project focuses on practical implementation, demonstrating architectural patterns and interface designs tailored for mobile hardware. It includes guidance on managing asynchronous data flows, integrating multimedia and networking capabilities, and imple

This project is an open-source learning management system built as a web-based application on the Frappe framework. It provides a structured environment for creating, managing, and delivering educational curricula, allowing administrators to organize learning materials into hierarchies of courses, chapters, and lessons. The platform is distinguished by its metadata-driven architecture, which defines application entities and database schemas through JSON-based definitions rather than hard-coded classes. This approach enables dynamic runtime customization of the user interface and data models,

EspoCRM is an open-source customer relationship management platform and SQL-based business application. It serves as a centralized web interface for tracking leads, opportunities, and contacts, providing a sales pipeline manager and a customizable business logic engine. The platform is distinguished by its ability to function as a custom business application builder, allowing for the creation of tailored entities and automated workflows. It integrates marketing automation tools for campaign coordination and a structured customer support ticketing system for case management. The system covers