Lambdaj: manipulate java collections without loops

If you really push bulk collection / vector oriented programming, you end up with something like J, K, or Joy. There's a ton of resources at no stinking loops (http://www.nsl.com/), if you're interested. (It's too bad J and K are closed source.)

FWIW, Joy (http://www.latrobe.edu.au/philosophy/phimvt/joy.html) is quite simple, like Forth. I wrote an interpreter in Prolog in about an hour last weekend.

Two similar projects that might be interesting:

http://functionaljava.org/

http://commons.apache.org/sandbox/functor/

You might also be interested in this -> http://github.com/hraberg/enumerable

just from a 5-second glance, reminds me of jQuery idiomatic style

Looks really handy!