aspell
is a utility that can function as an ispell -a replacement, as an independent spell checker, as a test utility to test out Aspell features, and as a utility for managing dictionaries.

ispell
is a wrapper around aspell to invoke it in ispell compatible mode.

spell
is a wrapper around aspell to invoke it in spell compatible mode.

aspell-import
imports old personal dictionaries into Aspell.

precat
decompresses a prezipped file to stdout.

preunzip
decompresses a prezipped file.

prezip
is a prefix delta compressor, used to compress sorted word lists or other similar text files.

prezip-bin
is called by the various wrapper scripts to perform the actual compressing and decompressing.

pspell-config
displays information about the libpspell installation, mostly for use in build scripts.

run-with-aspell
is a script to help use Aspell as an ispell replacement.

word-list-compress
compresses or decompresses sorted word lists for use with the Aspell spell checker.