See here: http://gwenview.sourceforge.net/tools http://picwiz.sourceforge.net http://linux.bytesex.org/fbida http://users.otenet.gr/~geosp/gwenrename
One bug per request. We take this one for picwiz. Open another bug for gwenrename, please. Fbida is already in the repository.
No progress here for 1 year, closing WONTFIX. Feel free to reopen with an ebuild.