Good news everyone!
There is a small online bitmap font generator tool written in AS3 that supports starling xml format. Hope it would be useful for windows users, who can not try such great tools like bmGlyph and Glyph Designer.
It's still in beta, so if you find any bugs or have ideas/feature requests, feel free to leave comments in this topic or write an email (you can find the address in the program's top right corner).
Thanks.
http://kvazars.com/littera/