I like the "snap" font which is the default for DockPod Aqua theme. Unfortunately, it has no cyrillic support (only Latin alphabet, plus additional German characters, and Hebrew alphabet). Fortunately, Debian package for artwiz fonts has Cyrillic alphabet! I combined the characters for "snap" font from all the sources, it is in the attachment. Except for Cyrillic support, now it has a better letter "beta" (which is also used in German for "double s").
May be it make sence to update it in the Rockbox sources?