SFZ: free soundfont player.
Synth 1: an excellent free synth with a great sounding.
Lazysnake: LazySnake is a virtual electric piano VSTi.

mp3 demo

HAHAHA-CS33: an excellent virtual synthetiser.

mp3 demo

Richman 2: a very expressive free vst plugin that can make real sounding and organic sounds.

mp3 demo

Stringz 2: a new improved version of StringZ that provides pad ensemble sounds as well as PM sounds.

mp3 demo

Free Alpha 3: A synth that emulates the sound of the early-1980s analog synthesizers.
Tramp 4: emulation of the classic fm synth of the 80's.

mp3 demo

Mr Ray : a very good electric piano vst.