24.3 VimMany distributions of Vim ship with support for Scheme, which will mostly work for Racket. As of version 7.3.518, Vim detects files with the extension .rkt as having the scheme filetype. Version 8.2.3368 added support for .rktd and .rktl. In older versions, you can enable filetype detection of Racket files as Scheme with the following: