RadaeePDF - RadaeePDF is a library for developers who want to render, manipulate, annotate PDF files on Android, iOS and Windows.
noise.sh - Excel for music producers and sound designers
Anvil PDF Filling API - The easiest way to programmatically populate any PDF
Composer's Sketchpad - A doodle-y iPad sequencer for making quick musical sketches
genei.io - AI-generated summaries for any article or research paper.
Helio - Design successful products by revealing key user behaviors