Drumforge – Free open-source interactive drum exercises
Clean interface for drum rudiments, but lacks novel interactive features.

Real darbuka samples and notation where generic metronomes fail.
Darbuka players, percussionists, music students
Pro Metronome · Complete Rhythm Trainer · Metronome Beats
I found that it was a bit hard to find tools and resources on how to play the darbuka, so I made an app where you can input rhythms and play them back with real drum sounds (recordings provided courtesy of my drum teacher!!) and directly coded in support for things like common Middle Eastern rhythms.
I've been using this app a lot for my own drumming practice, and I wanted to share it in case others found it helpful or interesting.
Clean interface for drum rudiments, but lacks novel interactive features.
Clever latency compensation lets wireless headphone users rap in sync.
Topic-based conversation generator when Talkpal and Lingodeer already do this.
Real-time missile-defense physics sim in browser, but niche audience and novelty-first execution.
Prerequisite graph + spaced repetition schedules LeetCode problems, but Codeforces already does adaptive difficulty.
Jupyter for raags—text notation, playback, and visual score in one notebook, no signup.