Synthfont is described as 'SynthFont is a program for playing midi files using SoundFonts. It can also include VST instruments. Midi input for live playback is also supported' and is an app in the Audio & Music category. There are more than 25 alternatives to Synthfont for a variety of platforms, including Windows, Mac, Linux, the Web and iPad. The best alternative is LMMS, which is both free and Open Source. Other great apps like Synthfont are FL Studio (Paid), Ardour (Freemium, Open Source), AudioTool (Free) and Cakewalk (Free).