epkg is a tool for Gentoo which implements debian's dpkg and gentoo's equery functionality. it may be useful to those who are familiar (or used to) dpkg, or those, who wants a tool faster than equery.
upd. moved to github https://github.com/norayr
genorphan is tool for gentoo which have same behavour as debian's deborphan
it shows packages which can be removed, cause other package doesn't depend on them
genorphan is a tool which I need, and so I wrote it
upd. moved to github https://github.com/norayr