[cies]

Have you tried Helm in Emacs? For me it binds to M-x, and I can find a "lost" command by typing just bits.

For example "M-x tree undo" show me "undo-tree-visualize (C-x u)".

Now I use Helm all over the place: (recent) file opening (within the current project), buffer switching, grepping, etc. It really changed how I interface Emacs.

[csdrane]

What's the advantage of Helm to Ido?

[ludwigvan]

Helm by default ands the query terms. Notice how he typed the second word first. Ido searches linearly. Helm is also much more ambitious in general

[rando289]

I prefer smex for M-x command matching (which is self described as Ido-style).

[tuhdo]

I wrote it in my guide: http://tuhdo.github.io/helm-intro.html#sec-2