Needle

Dependency injection with Needle.

Sometime last year I had given a little talk on aspect oriented programming, dependency injection, inversion of control. Used the Spring Framework (for Java) to illustrate it. I thought introducing Spring was great for productivity, but it pales in comparison with Needle. Needle for Ruby makes Spring (and as usual Java) look like a beast in terms of productivity, readability, and maintenance costs.

Check it out at: http://needle.rubyforge.org