- Mark Volkmann's excellent introduction to #Clojure article has been updated (via @seancorfield). This has been around for ages but it is up to date and an excellent reference document.
- Overtone sounds generated by L-systems (via @daveray). The code is here.
- koans developing here for core.logic and core.match (via @swannodette). A koan is a small exercise where you must make a number of predefined test pass. This is an excellent introduction to the core.logic and core.match libraries.
- Announcing the #Clojure Koan-Engine(via @sritchie09). Make your own Clojure koans!