This library is no longer maintained.

Loopless is a Common Lisp library that obsoletes LOOP with just a few straightforward utilities. Seriously!

Here's a slightly longer and more formal description:

Loopless contains utilities that provide a compelling alternative to LOOP for the vast majority of its use-cases. Most of these utilities are straightforward to learn and use, and are consistent in style with other standard Common Lisp constructs. All of them are easily composable with the rest of the language, unlike LOOP's monolithic approach.

Project site: http://www.loopless.org/