Rosetta code

Rosetta code provides some interesting programming demos.

Random computation

This blog has some interesting materials related to stochastic computation.

Real world clojure

A list of real world Clojure application.

Data sorcery with Clojure

Some useful examples using Incanter for data analysis.

Clojure demos

Here are some cool Clojure demos. By the way the IntelliJ community edition works really well with Clojure (with plugin, of course). It's free and open source.