Projects sharing features with Bitcoin

web3.js is a comprehensive TypeScript library designed to facilitate interaction with Ethereum-compatible blockchain networks. It serves as a foundational toolkit for decentralized applications, providing the necessary interfaces to query network state, manage cryptographic identities, and execute smart contract transactions. By abstracting the complexities of blockchain communication, the library enables developers to integrate decentralized logic directly into their applications. The library distinguishes itself through a modular architecture that prioritizes extensibility and flexible conn

Insomnia is a cross-platform API development environment that integrates a request debugger, schema design tools, a mocking server, and a test automation framework. It provides a unified workspace for sending requests and analyzing responses across REST, GraphQL, gRPC, and WebSocket protocols. The platform enables the design and preview of API specifications through a visual editor and allows for the simulation of backend behavior using mocking tools. It supports organizing and synchronizing API collections via local storage, cloud synchronization, or Git. The suite includes a command-line i

UPX is a command-line utility designed to reduce the file size of compiled programs and shared libraries. It functions as an executable binary compressor that maintains the ability for files to run natively without requiring additional runtime dependencies or external decompression software. The tool operates by parsing executable headers and applying entropy-based compression to code segments. It achieves this by injecting a self-extracting stub into the binary, which facilitates in-place memory decompression during the initial execution phase. This process includes platform-specific binary

Zcash is a privacy-preserving cryptocurrency that operates a blockchain where transactions can be shielded using zero-knowledge proofs. Its reference full node, zcashd, stores the complete transaction history and validates both transparent and shielded transactions, preserving confidentiality for sender, receiver, and amount. The node implements the Sapling and Orchard shielded protocols, with Orchard using the Halo2 proving scheme to eliminate the need for a trusted setup. It offers a dual-address model that lets users choose per transaction between transparent (fully public) and shielded (p

Monero is a privacy-focused cryptocurrency and proof-of-work blockchain designed for private digital payments. It utilizes a peer-to-peer network and a distributed ledger to allow users to send and receive currency while hiding transaction senders, receivers, and amounts. The system achieves financial confidentiality through the use of ring signatures for sender obfuscation and RingCT with Bulletproofs to hide transaction values. To ensure network security and decentralization, it employs a memory-hard proof-of-work algorithm optimized for general-purpose CPUs. The project provides a full no

java-tron is a Java implementation of a Tron blockchain full node. It provides the core infrastructure for running a network node, validating transactions, and producing blocks. The project includes a proof-of-stake consensus engine, a distributed ledger database, and a smart contract runtime to manage on-chain state transitions. The system is distinguished by its support for both full and lite node operations, utilizing state snapshots to accelerate synchronization and reduce hardware requirements. It features a multi-engine database abstraction that allows for storage migration, partitionin

Dogecoin is a decentralized cryptocurrency node that enables participation in a peer-to-peer network to validate transactions and maintain a shared, permanent record of ownership. It utilizes a proof-of-work consensus mechanism to secure the blockchain and tracks digital asset transfers through an unspent transaction output model. The software distinguishes itself by integrating anonymity routing to obscure the physical location and identity of participating nodes, allowing for private peer networking. It also provides high-performance messaging interfaces that broadcast real-time transaction

This project is a blockchain node software implementation that maintains a decentralized ledger using the Ouroboros proof-of-stake consensus protocol. It provides a complete environment for operating a distributed record, including a cryptocurrency wallet backend and a peer-to-peer network layer. The system is distinguished by its use of a UTXO-based ledger model and a diffusion-based state synchronization layer for node communication. It integrates a Public Key Infrastructure with TLS-authenticated communication to secure inter-node traffic and employs hierarchical deterministic key derivati

Lnd is a full implementation of the Lightning Network protocol, functioning as a Bitcoin Layer 2 daemon that manages payment channels and settles transactions on the Bitcoin blockchain. It serves as an off-chain payment processor and a cryptographic wallet manager, enabling the execution of instant, scalable transactions through a network node. The project distinguishes itself through a focus on secure node networking and programmatic control. It provides gRPC and REST API servers for automating payment workflows and utilizes macaroon-based authorization to delegate granular permissions via c

Corda is a distributed ledger technology platform used to build private, interoperable business networks. It provides a framework for creating shared records of facts and executing smart contracts between specific participants without requiring global data broadcasting. The platform distinguishes itself through a point-to-point state distribution model and a UTXO-based ledger, ensuring that transaction data is shared only between involved parties to maintain strict privacy. It utilizes a JVM-based smart contract engine to execute business logic written in Java or Kotlin and employs a notary-b

Stellar Core is the primary software implementation of the Stellar blockchain network, serving as a distributed ledger and a Federated Byzantine Agreement system. It functions as a core node that maintains the shared state of the network and provides a runtime environment for executing WebAssembly smart contracts. The project enables the creation and management of digital assets, including the implementation of decentralized exchanges through distributed orderbooks and automated liquidity pools. It facilitates cross-border payment settlement by routing assets via path payments and bridging di

Parity is an Ethereum client node implementation designed to run a full node, validate blocks, and maintain a local copy of the blockchain. It functions as a blockchain state engine that executes smart contracts and manages distributed ledger state through a peer-to-peer network. The project includes a synchronization engine to download and verify historical block data to reach current network height and a cryptographic key manager for generating and storing private keys used to sign transactions. The system covers distributed ledger interaction via a command line interface for querying netw

Cassandra is a distributed NoSQL database and wide-column store designed for high availability and linear scalability. It functions as a fault-tolerant distributed system that utilizes an LSM-tree storage engine to optimize write throughput and manage massive datasets. The system is a CQL-compliant database, using a structured query language to manage and retrieve tabular data stored across multiple nodes. It organizes information into rows and columns based on a flexible schema and primary keys. The project provides capabilities for horizontal database scaling, distributed data partitioning

Crafting Interpreters is a comprehensive resource for building a complete programming language from scratch. It provides a structured guide to the fundamental components of language implementation, including lexing, parsing, and the design of execution engines. The project demonstrates two distinct approaches to language execution: a tree-walking interpreter that evaluates source code by traversing its abstract syntax structure, and a stack-based virtual machine that compiles code into custom bytecode for execution. These implementations are supported by core runtime mechanisms such as lexica

kube-bench is a Kubernetes security benchmark scanner and configuration auditor. It verifies if a cluster adheres to the Center for Internet Security standards and other hardening guides to identify security misconfigurations and vulnerabilities. The tool operates as a containerized security scanner, utilizing host namespaces to analyze nodes and control plane components without requiring the installation of binaries directly on the host. It supports multiple Kubernetes distributions, applying environment-specific benchmarks to ensure auditing accuracy for managed services. The project cover

This project is an educational compiler implementation and a minimalist compiler construction tutorial. It serves as a practical example of how to build a functional compiler through a simplified end-to-end development process, transforming source code into executable instructions. The implementation is designed to teach the fundamentals of language implementation and compiler design. It focuses on the essential mechanics of transforming source code by demonstrating the core architecture of a translation process. The system covers the primary stages of compilation, including lexical analysis

The WebAssembly Binary Toolkit is a suite of tools for inspecting, validating, and transforming WebAssembly modules between binary and human-readable representations. It includes a stack-based interpreter for executing modules and a transpiler that converts binary files into C source code and headers. The toolkit provides utilities for assembling human-readable text into binary modules and disassembling binary files back into text. It features a text formatter for normalizing definitions into a canonical flat representation and supports the conversion of binaries into S-expression formats. T

Erigon is an Ethereum execution client and blockchain archive node designed to maintain full or archive copies of the blockchain. It functions as a Proof-of-Stake validator, an Ethereum RPC server, and a network validator operation tool, providing the core infrastructure to validate blocks and secure the chain. The project distinguishes itself through high-performance storage and data distribution, utilizing a flat key-value state storage system instead of a Merkle Patricia Trie to increase read and write speeds. It employs BitTorrent-based data distribution for immutable historical blockchai

Tengo is a dynamic, embeddable scripting language for Go applications that allows for the execution of custom scripts without requiring the host binary to be recompiled. It operates as a bytecode-compiled virtual machine, transforming source code into a compact intermediate representation for execution on a stack-based engine. The system is designed as a secure scripting sandbox, enforcing strict limits on memory allocation and execution time to safely run untrusted code. It supports concurrent script execution by cloning compiled bytecode and using recursive immutability conversion to share

This project is a collection of technical resources, blueprints, and guides for building resilient and stealthy red team infrastructure. It provides a comprehensive framework for designing offensive security environments that resist detection and remain operational throughout security engagements. The repository distinguishes itself through detailed playbooks for adversary simulation and hardening manuals. It covers advanced obfuscation techniques such as domain fronting, the use of platform-as-a-service redirectors, and the leveraging of third-party content sites to inherit domain reputation

Wren is a bytecode-compiled, class-based scripting language designed as an embeddable programming language. It provides a lightweight runtime and interface for executing dynamic scripts directly within host software applications. The engine utilizes a single-pass compiler to transform source code into compact bytecode and a virtual machine to process those instructions. It supports concurrent task execution through a system of lightweight fibers and coroutines. The language implements a class-based object model with dynamic message dispatch for organizing code into reusable components. It al

This repository contains the design specifications for WebAssembly, serving as a technical standard for portable low-level code. It defines the binary format, instruction set, and execution semantics required to ensure consistent behavior across different hardware platforms. The project establishes the framework for a language compilation target, detailing the requirements for translating high-level programming languages into a low-level binary format. It includes a security model that defines operational rules and safety goals for executing untrusted binary code. The specifications cover th

Grin is a protocol implementation and blockchain node that provides a confidential transaction system. It uses Pedersen Commitments and homomorphic encryption to verify value integrity and ensure a consistent money supply without revealing specific transaction amounts or participant identities. The project distinguishes itself through an interactive transaction exchange model, where wallets coordinate multi-round data exchanges to build signed transactions. To maintain anonymity, the system supports onion-routed transaction delivery and masks originating IP addresses through specialized relay

Lynis is an automated security auditing and system hardening framework designed for UNIX-based operating systems. It functions as a command-line utility that inspects local system configurations to identify security vulnerabilities, configuration weaknesses, and compliance gaps. By executing a series of modular tests, the tool generates actionable reports and remediation suggestions to assist in strengthening system defenses. The project distinguishes itself through a highly modular architecture that relies on shell-script-based execution and native system inspection. Users can define custom

This project serves as a centralized, community-driven repository of technical knowledge and administrative resources. It provides a structured taxonomy that aggregates disparate information into a searchable framework, supporting continuous learning and rapid problem-solving for system administrators and cybersecurity practitioners. By mapping resources across offensive security, infrastructure management, and software development, it offers a unified path for skill acquisition and professional reference. The project is defined by a command-line-first design philosophy, prioritizing terminal

Redis is an in-memory, key-value database designed to provide sub-millisecond latency for read and write operations. It functions as a versatile data platform, serving as a distributed cache, a message broker, a NoSQL document store, and a vector database. The system utilizes an event-driven, single-threaded loop to process requests efficiently, while maintaining data durability through append-only persistence logs and asynchronous snapshotting mechanisms. What distinguishes Redis is its ability to handle complex data structures—including strings, hashes, lists, sets, and sorted sets—alongsid

This project provides educational materials and courseware focused on the theoretical and practical foundations of distributed systems design. It serves as a comprehensive curriculum covering the disciplines of consensus, data consistency, reliability engineering, and scalability. The instructional content focuses on achieving cluster agreement through consensus algorithms and managing system-wide state via coordination frameworks. It includes a dedicated guide to data theory, exploring replication strategies, consistency models, and data convergence. The courseware covers a broad capability