Design
GIMP
Professional image editor with layers, filters, and scripting support
Alternative to Photoshophttps://gimp.org
Inkscape
Vector graphics editor for SVG, EPS, and PDF files
Alternative to Illustratorhttps://inkscape.org
Krita
Digital painting application for illustrators and concept artists
Alternative to Procreate / Photoshophttps://krita.org
Blender
3D creation suite for modeling, animation, and rendering
Alternative to Maya / 3ds Maxhttps://blender.org
Communication
Rocket.Chat
Team communication platform with channels, DMs, and video calls
Alternative to Slackhttps://rocket.chat
Element (Matrix)
Decentralized, end-to-end encrypted messaging
Alternative to Slack / Discordhttps://element.io
Mattermost
Self-hosted team messaging with integrations
Alternative to Slack / Microsoft Teamshttps://mattermost.com
Project Management
OpenProject
Project management with Gantt charts, boards, and time tracking
Alternative to Jira / Asanahttps://openproject.org
Focalboard
Project management alternative with boards and views
Alternative to Notion / Trellohttps://focalboard.com
Cloud Storage
Nextcloud
Self-hosted file sync, sharing, and collaboration platform
Alternative to Google Drive / Dropboxhttps://nextcloud.com
Syncthing
Peer-to-peer file synchronization between devices
Alternative to Dropboxhttps://syncthing.net
Office
LibreOffice
Full office suite with writer, calc, and presentation tools
Alternative to Microsoft Officehttps://libreoffice.org
ONLYOFFICE
Online office suite with real-time collaboration
Alternative to Google Docshttps://onlyoffice.com
CryptPad
Encrypted collaborative office tools in the browser
Alternative to Google Docshttps://cryptpad.org
Video Editing
Kdenlive
Multi-track video editor with effects and transitions
Alternative to Premiere Prohttps://kdenlive.org
Shotcut
Cross-platform video editor with wide format support
Alternative to Premiere Prohttps://shotcut.org
OpenShot
Easy-to-use video editor with drag-and-drop interface
Alternative to iMoviehttps://openshot.org
DaVinci Resolve
Professional video editing, color grading, and audio
Alternative to Premiere Pro / Final Cuthttps://blackmagicdesign.com/products/davinciresolve/
Photo Editing
RawTherapee
RAW photo processing with non-destructive editing
Alternative to Lightroomhttps://rawtherapee.com
Password Manager
Bitwarden
Secure password manager with cross-platform sync
Alternative to 1Password / LastPasshttps://bitwarden.com
KeePassXC
Offline password manager with strong encryption
Alternative to 1Passwordhttps://keepassxc.org
Vaultwarden
Self-hosted Bitwarden-compatible server
Alternative to 1Password / LastPasshttps://github.com/dani-garcia/vaultwarden
Mailcow
Self-hosted email server with web interface
Alternative to Gmail / Exchangehttps://mailcow.email
Notes
Obsidian
Knowledge base with linked markdown notes
Alternative to Notion / Evernotehttps://obsidian.md
Standard Notes
Encrypted notes with longevity focus
Alternative to Apple Notes / Evernotehttps://standardnotes.com
Trilium
Hierarchical note-taking with rich features
Alternative to Notionhttps://github.com/zadam/trilium