Description: Codewars is an educational community for computer programming. It offers code challenges known as kata which are ranked by difficulty. Users train on these coding challenges to improve their skills.
Type: software
Description: Sandstorm is an open source platform for self-hosting web apps. It allows you to run web apps on your own server while isolating them into secure sandboxes. Sandstorm handles authentication, access control, versioning, and backups for the apps.
Type: software
Pricing: Open Source