Open Source Communication & Collaboration Tools

Alternative toSlack

Self-hosted team chat where people and AI agents work together

• 36,174 GitHub stars
• Apache-2.0Licence Apache-2.0
• #Chat

Alternative toCodecademy

Free, open source coding curriculum with verified certifications

• 457,587 GitHub stars
• BSD-3-ClauseLicence BSD-3-Clause

InCustomer Support

136k+ public TV channels, free M3U playlists and EPG data

• 141,716 GitHub stars
• UnlicenseLicence Unlicense
• #Video

Alternative toMiro

Open source whiteboard for hand-drawn style diagrams

• 134,025 GitHub stars
• MITLicence MIT

Alternative toSend Anywhere

Free cross-platform file sharing over local network, no cloud

• 95,009 GitHub stars
• Apache-2.0Licence Apache-2.0

Alternative toCursor

High-performance open source code editor with built-in AI

• 91,958 GitHub stars
• Apache-2.0Licence Apache-2.0
• #Coding

Alternative toResilio Connect

Decentralized continuous file sync with no central server

• 89,563 GitHub stars
• MPL-2.0Licence MPL-2.0

Alternative toElevenLabs

Voice cloning, dubbing, and transcription that runs fully offline

• 78,615 GitHub stars
• AGPL-3.0Licence AGPL-3.0

Alternative tovMix

Record and stream with multi-source scenes and hardware encoding

• 77,813 GitHub stars
• GPL-2.0Licence GPL-2.0
• #Video

Alternative toNotion

Open source Notion alternative with AI, self-hosted

• 77,613 GitHub stars
• AGPL-3.0Licence AGPL-3.0

Alternative toGoogle Keep

Self-hosted note timeline with per-memo privacy, zero telemetry

• 63,934 GitHub stars
• MITLicence MIT

Alternative toFigma

Open source collaborative UI design and whiteboard workspace

• 61,434 GitHub stars
• MPL-2.0Licence MPL-2.0