The best alternatives to Open Source Tools Stack! are Feather, btw, and Medusa. If these 3 options don't work for you, we've listed a few more alternatives below.
What do you think of Open Source Tools Stack!?
Enterprise Ready Conference by WorkOS— For prod/eng leaders —speakers from OpenAI, Vanta, Canva
Feather is a collection of simply beautiful open source icons. Each icon is designed on a 24x24 grid with an emphasis on simplicity, consistency and readability.
Mapus is an open source tool to explore and annotate collaboratively on a map. You can draw, add markers, lines, areas, find places to go, observe other users, and much more.