"Protocols for Manipulating Biological Data": a set of tools that filter, format, and merge data in tabular or common biological formats; organized as a classified collection of Perl one-liners
A free sequence database application for Unix. It includes a sequence editor, several sequence aligners, phylogeny reconstruction tools, probe/primer search and generation, genome annotation and visualization. In addition to the integrated user-interface the ARB database can be accessed using Perl or C