VIM for Mac

From MacVim:

Vim is a text editor that is upwards compatible to Vi. It can be used to edit any ASCII text. It is especially useful for editing programs.

There are a lot of enhancements above Vi: multi level undo, multi windows and buffers, syntax highlighting, command line editing, filename completion, on-line help, visual selection, etc.. See ":help vi_diff.txt" for a summary of the differences between Vim and Vi.

While running Vim a lot of help can be obtained from the on-line help system, with the ":help" command. See the ON-LINE HELP section below.

Most of VIM was written by "Bram Moolenaar", but there are a huge number of people still contributing to it. VIM is "Charityware", if you use it you are encouraged to donate to orphans in Uganda (please do ":h copyright" in VIM to see more)