I'm slightly appalled by what I'm hearing about typing "f" in between every conjuncted letter. That must make typing a terrible pain!
All our modern operating systems have built-in stuff for making conjuncts automatically by just typing the letters one after another (as in romanization).
* I don't understand why MS Win and OS/X users are doing this other, laborious thing. Am I missing something obvious?
When I type Devanagari, I type kRSNa and get कृष्ण, kArtsnyam for कार्त्स्न्यम् . It's the same whatever program I'm using, because the keyboard/language stuff is handled by the operating system, not each individual program. As far as I know, anyhow. It's handled by software on my system, Ubuntu Linux, called Ibus and m17n (which comes with Devanagari and IAST romanization already pre-defined).
Dominik