A couple of my favorite projects hosted here:
protoHISTORYbowl Inspired by neotenic's protobowl. Play through NHBB tossups read word-by-word!
pHb-DB Search the entire 2016-2019 NHBB and US History Bee question database.
SGK CV-19 A 3-osc subtractive synthesizer.
SGK CV-19-Drum A nifty 2-in-1 drum synthesizer and two-measure sequencer.
Unfigured Bass A tool to aid composers and AP Music Theory students in identifying chordal members given the key signature, bassnote, and figured bass, with an emphasis on 18th-century common practice part-writing rules.
Unfigured Bass (from Roman Numerals) See above.