Open-source alternatives to Foundatio

Simple logging

A Rake task gem that helps you find the unused routes and controller actions for your Rails 3+ app

Polly is a resilience and transient-fault-handling library for .NET applications. It provides a framework for defining and executing stability patterns that manage failures and resource exhaustion during operation execution. The library enables developers to compose complex resilience strategies through a fluent builder pattern, wrapping target operations in functional decorators. These policies intercept execution flow to apply automated recovery mechanisms, such as retries for temporary errors or circuit breakers that isolate unstable components by blocking requests. The framework supports

High performance, thread-safe in-memory caching primitives for .NET

A set of Rack middleware and cache helpers that implement various caching strategies.

Delightful on-disk cache (written in Swift)

Log4r is a comprehensive and flexible logging library for use in Ruby programs. It features a heirarchical logging system of any number of levels, custom level names, multiple output destinations per log event, custom formatting, and more.

Archived Libraries for in-memory caching and distributed caching. Project moved to https://github.com/aspnet/Extensions

Silverback is a message bus and broker integration library for .NET. It is designed to simplify event-driven architectures and asynchronous messaging, with first-class support for Apache Kafka and MQTT.

Caffeine is a high-performance caching library for the Java virtual machine designed to manage object lifecycles within the application heap. It functions as a thread-safe, memory-resident data store that reduces latency by keeping frequently accessed objects available for immediate retrieval. The library distinguishes itself through a sophisticated eviction strategy that balances recency and frequency to determine which entries to retain. It utilizes a frequency-based admission policy to evaluate the historical access patterns of new data, ensuring that the cache remains populated with the m

Django Cachalot

Apache Log4net is a versatile, feature-rich, efficient logging API and backend for .NET

A cache module for nodejs that allows easy wrapping of functions in cache, tiered caches, and a consistent interface.

In-memory and distributed caching toolkit for Elixir.

CakeDC Cached Routing

MQTTnet is a .NET library providing a framework for implementing MQTT clients and brokers. It includes a broker implementation for hosting a central message hub that routes messages between connected clients and a client library for publishing and subscribing to messages. The project supports both TCP and WebSocket transport layers, enabling secure data traffic through transport layer security. It allows for the development of custom middleware to intercept, transform, or validate messages as they pass through a server. Capability areas include distributed message routing, persistent connect

An observable microservice bus library for .NET, that wraps the underlying message transports in simple Rx based interfaces.

Seelog is a native Go logging library that provides flexible asynchronous dispatching, filtering, and formatting.

App Metrics is an open-source and cross-platform .NET library used to record and report metrics within an application.

SimpleCov is a Ruby code coverage tool and analysis engine used to track which lines, branches, and methods of code execute during tests. It functions as a coverage threshold enforcer and test suite aggregator, recording execution data to identify untested areas of an application. The tool distinguishes itself through the ability to merge coverage results from parallel worker processes and subprocesses into a single unified report. It supports baseline comparison to detect coverage regressions and can gather data from code executed via dynamic evaluation methods, such as those used in templat

Memcached client for Crystal language

Dead simple Ruby Syslog logger

A key/value store where pairs can expire after a specified interval

LibLog is a single file for you to either copy/paste or install via nuget, into your library/framework/application to provide a logging abstraction.

A toolkit to create code-first HTTP reverse proxies on ASP.NET Core

A lightweight and customizable file logger implementation for the Microsoft.Extensions.Logging framework.