bio-executables is a collection of miscellaneous utilities for bioinformatics that were formerly part of the BioRuby core ("bio" gem). Because of reducing complexity, they were moved to this gem. This code has historically been part of the BioRuby gem, but has been split into its own gem as part of an effort to modularize BioRuby. bio-executables and many more plugins are available at biogems.info.