From Bioinformatics.Org Wiki
Sequence manipulation tools
a set of small utilities written in ANSI C to manipulate DNA sequences in a Unix fashion, fit for combining within shell and cgi scripts
Genpak is a set of simple tools for manipulation of nucleic and protein sequences, written in ANSI C. The programs are supposed to be small, efective, use the Unix pipe/redirect and have a GUI via WWW/CGI.
Source & executables