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27 projects, sorted by GitHub stars.

tailcat

Alternative toTailscale

Encrypted tunnels between machines, no account or IP needed

  • 8,483 GitHub stars
  • BSD-3-ClauseLicence BSD-3-Clause

Pixelfed

Alternative toFlickr

Fediverse photo sharing: no central platform, fully user-owned

  • 7,132 GitHub stars
  • AGPL-3.0Licence AGPL-3.0

OpenCloud

Alternative toBox

File sync for organizations with data sovereignty and S3 storage

  • 6,240 GitHub stars
  • Apache-2.0Licence Apache-2.0

Plexo

Alternative toInternet Download Manager

Multi-network download manager for files, torrents, and magnets

  • 4,984 GitHub stars
  • MITLicence MIT

MiroTalk

Alternative toZoom

Free browser-based video calls with no sign-up required

  • 4,807 GitHub stars
  • AGPL-3.0Licence AGPL-3.0
  • #Chat

LibreOffice

Alternative toMicrosoft 365

Free office suite with Writer, Calc, and Impress on any platform

  • 4,560 GitHub stars
  • GPL-3.0Licence GPL-3.0

Converse.js

Alternative toSlack

Self-hosted web-based XMPP chat client for any server

  • 3,301 GitHub stars
  • MPL-2.0Licence MPL-2.0
  • #Chat

Apache PDFBox

Alternative toiText 7

Open source Java library for creating and parsing PDFs

  • 3,138 GitHub stars
  • Apache-2.0Licence Apache-2.0

Wire

Alternative toMicrosoft Teams

End-to-end encrypted messaging, voice, and file sharing

  • 2,780 GitHub stars
  • AGPL-3.0Licence AGPL-3.0
  • #Chat

Tox

Alternative toThreema Work

Free encrypted P2P messaging and voice calls, no servers

  • 2,695 GitHub stars
  • GPL-3.0Licence GPL-3.0
  • #Chat

Quiet

Alternative toSlack

Peer-to-peer serverless chat app with no central server

  • 2,658 GitHub stars
  • GPL-3.0Licence GPL-3.0
  • #Chat

SpacebarChat

Alternative toDiscord

Free open source Discord reimplementation with full API parity

  • 2,210 GitHub stars
  • AGPL-3.0Licence AGPL-3.0
  • #Chat
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