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

Ryan C. Thompson 0d37d93bcb Do small fixes and add debug messages for old-style defaults 10 years ago
ChangeLog a6f28fabb0 Document changes in ChangeLog 10 years ago
README.md c430dd331d Improve some documentation 10 years ago
ido-completing-read+.el 129ad44d38 Remove spurious quotes from modeline 10 years ago
ido-ubiquitous.el 0d37d93bcb Do small fixes and add debug messages for old-style defaults 10 years ago

README.md

ido-ubiquitous

Gimme some ido... everywhere! This pacakge 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

Note that ido-ubiquitous is not enabled for org mode or magit mode, because those modes have their own built-in support for ido, which you should enable instead. Also, to enable ido for all file and buffer completion, customize ido-everywhere.