Linux

Wox provides an open-source launcher for Windows, macOS, and Linux, according to its project page.

Edit code with Lite XL, a lightweight editor available for Windows, Linux, and macOS.

Stoat provides messaging for friends and communities through a chat app designed for group communication.

Syncplay synchronizes video playback across media players so groups with the same videos can watch together over the internet.

SuperCollider provides a free, open source platform for audio synthesis and algorithmic composition, with an audio engine, language, and editor.

Packet Sender sends and receives TCP, UDP, SSL, and DTLS packets and supports HTTP requests.

SPARTA offers open-source plugins for spatial audio production and playback, including high-resolution Ambisonic tools.

OnionShare uses Tor to share files anonymously, host websites, and chat with others.

auto-cpufreq adjusts CPU speed and power use automatically on Linux systems.

Decent Samples sells sample libraries and offers a free trial for some products, with categories and prices shown in its shop.

Convert videos with XviD4PSP, a program for video processing and format conversion.

Scan IP addresses and ports concurrently with rang3r, a multithreaded scanner.

Manage files in a terminal with superfile, which lists support for macOS, Linux, and Windows.

Dino is a modern open-source desktop chat client for Jabber/XMPP.

Magit puts Git operations in a text-based interface inside Emacs, according to its project page.

electron-builder packages Electron applications for distribution and supports automatic updates.

Compress video files by up to 90 percent with Rotato's online video tools.

Cattail provides an unofficial client for Tailscale and Headscale on Linux and Windows.

Callback Drive mounts SFTP servers as local drives for browsing and working with remote files.

lnav navigates log files and provides tools for searching, filtering, and querying logs.

MediaElch manages movies, television shows, concerts, and music, using scrapers to gather media information.

tinyMediaManager manages media libraries and provides metadata for media-center applications, according to its project page.

The Liquorix Kernel is an enthusiast Linux kernel designed for low latency and responsiveness in interactive systems.

Guitarix is a virtual guitar amplifier for Linux running on Jack, with amp, effects rack and LV2 DAW support.