Open-source alternatives to EventHub

Next-generation web analytics processing with Scala, Spark, and Parquet.

SQL-based streaming analytics platform at scale

An Alert Management Web Application

ElastAlert is an alerting framework and query monitor for Elasticsearch. It functions as a real-time log monitoring tool and event notification engine that scans indices for specific patterns to trigger automated alerts when predefined rules are matched. The system distinguishes itself through specialized detection logic, including event spike detection, event frequency monitoring, field change tracking, and the identification of new terms within data fields. It handles notification noise via stateful alert suppression to prevent redundant messages and provides time-windowed aggregation to gr

Open source framework for processing, monitoring, and alerting on time series data

Substation is a toolkit for routing, normalizing, and enriching security event and audit logs.

An convenient R tool for manipulating tables in PostgreSQL type databases and a wrapper of Apache MADlib.

Aidoku is a manga reader application and digital library manager. It serves as a modular content aggregator that allows users to discover, download, and read manga from various third-party sources and local files. The application utilizes a modular source plugin system to integrate external provider packages, enabling the ingestion of content from multiple third-party sources. It includes a sync engine that communicates with external tracking APIs to maintain consistent reading progress across different platforms. The system covers manga library management, including the ability to search fo

Kill Bill is a subscription billing platform and usage-based billing engine designed to manage recurring invoicing and automated payment collection. It functions as a multi-tenant billing infrastructure, providing isolated environments for different organizational entities through a dedicated API. The system is distinguished by a plugin-based extension framework that allows for the integration of third-party payment gateways and custom business logic. It includes a payment gateway orchestrator to handle transactions and refunds, as well as a revenue recognition system to allocate contract rev

Fast and reliable message broker built on top of Kafka.

Activiti is a workflow engine designed to model, execute, and manage business processes using the BPMN 2.0 standard. It functions as a Java-based framework that embeds process orchestration directly into enterprise applications and microservices to coordinate sequences of tasks and human-centric interactions. The platform utilizes a persistent state machine to maintain the status of long-running workflows in a relational database, ensuring continuity across system restarts. It manages high-volume environments through optimistic concurrency control, which tracks versioning tokens to prevent da

This liferay-portal repository contains the source code for Liferay DXP, Liferay's Java-based digital experience platform. Liferay Portal and Liferay DXP are now a single product. Building this repository produces a Liferay DXP bundle. The platform is maintained by Liferay engineering and a…

Moto is a cloud service mockery framework and API mock server that simulates AWS infrastructure locally. It allows developers to test cloud-dependent code and verify infrastructure-as-code templates without deploying real resources or incurring costs. The project functions as an SDK interceptor that can patch existing service clients to redirect requests to a local mock environment. It can also be run as a standalone HTTP server, enabling any programming language to interact with the simulated endpoints. The framework covers a vast array of simulated capabilities, including data storage, com