1. django-serializable-modelDjango classes to make your models, managers, and querysets serializable, with built-in support for related objects in ~150 LoC
2. trim-canvasA tiny (< 100 LoC) library for trimming whitespace from a canvas element with no dependencies
3. react-signature-canvasA React wrapper component around signature_pad (in < 150 LoC). Unopinionated and heavily updated fork of react-signature-pad
4. mst-persistPersist and hydrate MobX-state-tree stores (in < 100 LoC)