FontConverter.com allows you to quickly convert between many font formats. Works for all of the common font formats including TrueType (.ttf), OpenType (.oft) and PostScript (.ps). Suitcase (.suit) and Data Fork (.dfont) fonts.
You can convert from pfa, pfb, pt3, sfd, ttf, otf, otb, t42, cef, cff, gsf, ttc, svg, ik, mf, dfont, bin, suit and bdf.