Tinode is an open-source, self-hosted instant messaging platform with clients for iOS, Android, web, and CLI. Features group chats, read receipts, file sharing, push notifications, and video calls via WebRTC. Alternative to WhatsApp/Messenger. https://openaltfinder.com/tools/tinode #opensource

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Leantime is an open source project management system for small teams and founders. It combines goals, tasks, kanban, gantt, timesheets, idea boards, and an AI assistant. Self-hostable, AGPL-3.0, no per-seat pricing. https://openaltfinder.com/tools/leantime #opensource

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Outline is a fast, modern open source knowledge base and wiki for growing teams. A self-hostable Notion/Confluence alternative with real-time collaboration, Markdown import/export, full-text search, and a polished editor. https://openaltfinder.com/tools/outline #opensource

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UptimeKit is an open-source distributed monitoring platform with uptime checks, incident management, and public status pages. Fault-tolerant architecture handles high-scale workloads, and it's fully self-hostable via Docker. https://openaltfinder.com/tools/uptimekit #opensource

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Piwigo is an open-source, self-hosted photo gallery for organizing and sharing large collections with albums, tags, geo-tagging, and user permissions. A Google Photos alternative. https://openaltfinder.com/tools/piwigo #opensource

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