
Ranked by how solid each project is, then by potential. Every one is free and MIT licensed: pick a landing page or the README on GitHub.














The explicit MacCormack scheme for 1-D wave propagation.

First-order upwind differencing for 1-D wave propagation.













See what athletes wear, and what it's worth, right now.



Send push from your own server. Prove it works on a real phone.















Write an Etsy listing in five minutes.