cross-platform

AppFlowy is an open-source alternative to Notion that allows you to build detailed lists of to-dos for different projects while tracking the status of each one. It provides a comprehensive workspace for notes, tasks, databases, and collaboration with a focus on privacy and customization.

ActivityWatch automatically tracks how you spend time on your devices. It provides comprehensive activity monitoring, privacy-focused data collection, and detailed analytics to help you understand and optimize your digital habits and productivity.

Unison is a file-synchronization tool for OSX, Unix, and Windows that allows two replicas of a collection of files and directories to be stored on different hosts and synchronized by detecting changes and propagating them in either direction.

musikcube is a streaming audio server with Linux/macOS/Windows/Android clients. Built with C++, it provides cross-platform music streaming with terminal and GUI clients for versatile music playback.

PlexRipper is a cross-platform Plex media downloader that seamlessly adds media from other Plex servers to your own. It provides intelligent media transfer capabilities with advanced downloading, organization, and library integration features.

OpenAFS is a distributed network file system with read-only replicas and multi-OS support, providing secure, scalable file sharing across wide area networks with location transparency.