4 themes

Bee cell for FBReader, Gears for FBReader, Hedgehogs for FBReader, Postage Stamps for FBReader.

To install it, unpack it as root: /usr/local/share/pixmaps/FBReader (FreeBSD)
It can also be as root (sudo nautilus or sudo caja): /usr/share/pixmaps/FBReader (Linux)

Complete icons themes here:

Bee cell http://gnome-look.org/content/show.php/Bee+cells?content=168683
Gears http://gnome-look.org/content/show.php/Gears?content=168695
Hedgehogs http://gnome-look.org/content/show.php/Hedgehogs?content=168836
Postage Stamps http://gnome-look.org/content/show.php/Postage+stamps?content=168792