excalidraw / excalidraw

Virtual whiteboard for sketching hand-drawn like diagrams

evolus / pencil

The Pencil Project's unique mission is to build a free and opensource tool for making diagrams and GUI prototyping that everyone can use.

QymIs-Tech / QymCAD

Parametric 3D CAD with a real B-rep kernel (OpenCASCADE)

sourmash-bio / sourmash

Quickly search, compare, and analyze genomic and metagenomic data sets.