This roundup focuses on lossless compression tools which use multiple cores. Only free and open source software is included here.
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Author: Steve Emms
quickblog – lightweight static blog engine
quickblog is a lightweight static blog engine for Clojure and babashka.
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Fluux Messenger – modern, cross-platform XMPP client
Fluux Messenger is a modern, cross-platform XMPP client for communities and organizations.
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Kanzi – modern lossless data compressor
Kanzi is a modern, modular, portable, and efficient lossless data compressor.
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Soia – modern media player built on mpv
Soia is a modern media player built on mpv. It provides a clean interface for watching local media and streaming from network sources.
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Best Free and Open Source Software: June 2026 Updates
June 2026 updates to the largest compilation of recommended free and open source software available for Linux.
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DarkMoon – AI-powered autonomous penetration testing platform
DarkMoon is an AI-powered autonomous penetration testing platform.
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11 Best Free and Open Source Music Trackers
A music tracker (short version tracker) is a type of music sequencer software for creating music. We recommend the best free and open source trackers.
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Powerpack – batteries-included Clojure toolkit for building static websites
Powerpack combines Stasis with a collection of supporting tools, providing the wiring for content ingestion, development serving.
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Botspot Screen Recorder – all-in-one screen recording utility
Botspot Screen Recorder is an all-in-one screen recording utility for wlroots-based Wayland compositors such as LabWC, Wayfire, and Sway.
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8 Best Free and Open Source XMPP Servers
XMPP (also known as Jabber) is an open and free alternative to commercial messaging and chat providers. We select the best servers.
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Kotlin Formatter – tool for formatting Kotlin source code
This is built around ktfmt and provides a unified formatting workflow across the command line, Git hooks, Gradle, and IntelliJ IDEA.
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sandpaper – R package
sandpaper is an R package that provides the user interface for The Carpentries Workbench.
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7 Useful Free and Open Source Kotlin Linters
This article picks some useful tools to help you fix Kotlin code. Only free and open source software is eligible for inclusion.
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wf-recorder – command-line screen recording utility
wf-recorder is a command-line screen recording utility for wlroots-based Wayland compositors.
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Great Open Source Collaborative Editing Tools
This article highlights our favourite free and open source tools to collaborate on documents in real time.
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altdoc – R package
altdoc is an R package that helps package authors create, render, preview, and deploy documentation websites without relying on pkgdown.
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Communiqué – instant messaging client
Communiqué is an instant messaging client with a terminal-based user interface. It’s designed for services that support XMPP and Jabber.
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ecewo – asynchronous, single-threaded C web framework
ecewo is an asynchronous, single-threaded C web framework with an Express.js-style API.
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ktlint-gradle – Gradle plugin that integrates ktlint with Kotlin projects
ktlint-gradle is a Gradle plugin that integrates ktlint with Kotlin projects, creating tasks for checking code style.
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