Fancy completion all over Emacs, not just for buffers and files. https://github.com/DarwinAwardWinner/ido-completing-read-plus

Ryan C. Thompson 7996aec435 Reorganize code to avoid unnecessary collection expansion 11 gadi atpakaļ
ChangeLog 10ea202d34 Implement whitelist for collection functions 11 gadi atpakaļ
README.md 7a258468d4 Version 1.7 12 gadi atpakaļ
ido-ubiquitous.el 7996aec435 Reorganize code to avoid unnecessary collection expansion 11 gadi atpakaļ

README.md

ido-ubiquitous

Gimme some ido... everywhere!

Does what you were really hoping for when you did (setq ido-everywhere t). Replaces stock emacs completion with ido completion wherever it is possible to do so without breaking things.

Get it from http://marmalade-repo.org/packages/ido-ubiquitous