Here is a simple and (I hope) useful tool for learning Devanagari alphabet. Basically, it is a Flash application wrote in pure ActionScript3 programming language without any visual tools or IDEs. Devanagari alphabet consists of 49 "letters". Each Devanagari letter is given with corresponding IAST transliteration symbol (sometimes with alternative variants). You can also train pronunciation: alphabet is chanted by Igor Belyaev - prominent specialist in Sanskrit language and Indian culture.
Flash application can be found here.
And here, on GitHub, you can browse program's source code.