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The original was posted on /r/opensource by /u/petelombardio on 2025-10-12 15:44:27+00:00.
Hey everyone, what’s one open-source tool you stumbled on that ended up being way more useful than you expected?
Could be for coding, AI/ML, writing, research, replacing Google, whatever helped you out big time but you don’t hear people talk about much.
I use almost daily: Tuta Mail & Calendar, Signal, OpenSteetMap, Inkscape, but I feel like there are so many hidden gems that deserve more love.
Would be awesome to hear your picks, maybe even find some new favorites myself.