My list

MetatOGGer can rename, tag and classify music files (Ogg Vorbis, FLAC-, Speex, MP3, Musepack, Windows Media, WavPack and Monkey's Audio). It supports acoustic fingerprinting and scripting and can download lyrics and cover art.

Windows package manager for software updates, requiring no registration, prioritizing privacy with no tracking, and featuring a command-line interface.

gsudo is a sudo equivalent for Windows, with a similar user-experience as the original *nix sudo.

Windows Terminal is a new, modern, feature-rich, productive terminal application for command-line users. It includes many of the features most frequently requested by the Windows command-line community including support for tabs, rich text, globalization, configurability...

Media Player Classic Home Cinema (mpc-hc) is considered by many to be the quintessential media player for the Windows desktop. Media Player Classic Qute Theater (mpc-qt) aims to reproduce most of the interface and functionality of mpc-hc while using libmpv to play video instead...

Free open-source code editor and Notepad replacement supporting multiple languages, featuring high speed, low resource usage, privacy focus, and plugin extensibility.

Free open-source media system alternative to proprietary options, supports Chromecast, 4K streaming, plugin extensions, with privacy focus.

Halite (named after the mineral) is a C++ BitTorrent client based on the excellent libtorrent library from Rasterbar Software. The program also relies heavily on the Boost libraries.

Icaros is a collection of lightweight, high quality, Windows Shell Extensions, which is capable of providing Windows Explorer thumbnails for essentially any video media filetype.

A versatile platform for text and voice communication, featuring topic-specific channels, customizable moderation, and smooth low latency interactions.

BiglyBT is a feature filled, open source, bittorrent client based on the Azureus open source project, now Vuze .

Ninja Download Manager is an Internet download manager and accelerator that dramatically increases download speed and allows you to resume and restart stopped / broken downloads.

PeaZip is free file archiver utility, based on Open Source technologies of 7-Zip, p7zip, FreeArc, PAQ, and PEA projects, for Linux, macOS and Windows.

TeraCopy is a utility software for efficient and reliable file copying. It verifies copied files by comparing their hashes and can skip bad files during the process to avoid terminating the entire transfer.

A feature-rich, simple-to-use app seamlessly integrated with a clean, minimal and modern user interface.

Dopamine is an audio player which tries to make organizing and listening to music as simple and pretty as possible. It can play wav, mp3, ogg vorbis, flac, wma and m4a/aac.