Recommendable (web) applications
Chat / Messaging
- once-campfire - GitHub repository by Basecamp
- Revolt - A chat application designed with community in mind
- Gotify - A simple server for sending and receiving messages
CMS
- Ghost CMS - An open-source CMS favored for content sites
- Writebook - Publish your own books on the web for free
Development
- TestLink - Open source test and requirement management system
Document Management
- paperless-ngx - A document management system for scanning, indexing, and archiving documents
Home
- Home Assistant - Open source home automation with local control and privacy first, ideal for Raspberry Pi or local servers
Hosting
- Databasus - Free tool for PostgreSQL scheduled backups with cloud storage and notifications
- Dokku - Self-hosted open-source PaaS alternative to Heroku
- copyparty - Portable file server with WebDAV, FTP, TFTP, and media indexing
- Plunk - Open-source email platform combining marketing, transactional, and broadcast emails
Project Management
- OpenProject - Open source project management with task management, Gantt charts, boards, and team collaboration
Tasks
- TaskTrove - Self-hostable, privacy-focused TODO list management application