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: Openfire is an open source instant messaging and chat server. It uses the XMPP protocol and can be configured to work with many chat clients such as Spark, Pidgin, and Web clients. It is written in Java and has features like group chat, messaging archive, and plugins.
Type: software
Pricing: Open Source