Browser extensions that let DJs detect and adjust the tempo of tracks on Bandcamp and Discogs. Available for Chrome and Firefox, with a Safari app on the way.
A userscript that adds a random button to Hardwax, for when you want to dig but don't know where to start.
Three macOS Quick Actions for music collectors: get a spectrogram to check for fake lossless files, convert to 320kbps MP3, and convert to AIFF, all from the Finder right-click menu. The installation guide walks through setting them up.
Older, non-software projects live on the about page.