Mockoon : Mockoon is the easiest and quickest way to design and run mock APIs. No remote deployment, no account required, free and open-source.
Passbolt : Passbolt is a free and open source password manager that allows team members to store and share credentials securely. Passbolt is free, open source an...
ntfy : Send push notifications to your phone or desktop using PUT/POST
DokuWiki : DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
CryptoZombies is a free, open source, interactive code school that teaches you to build games on Ethereum. The course is designed for beginners to Solidity and starts off with the absolute basics.