Romaji to kanji?

I've been looking all over the web for a program that will convert Romaji to Kanji; my friend Sammi has the program installed on her computer, but I can't get ahold of her anymore (she's in Hawaii for college), so I don't know what she uses! Does anyone have a program that will convert Romaji to Kanji as you type it??

A thread to the same question just posted recently....

Thank you, @Elizabeth!!!