Here is a list of free vst plug in synths that are very useful for your music production. The list is regularly updated so do keep checking back.

Just click any link below for direct access to the free plug in.
Tal Uno 64 Roland Juno Replica
Tal Bass Line Roland SH-101 Replica
Dexed FM Synth Yamaha DX7 Replica
Ticky Clav 70's Clavinet Replica
Rave Generator - Classic Techno & House Sampler
FB 330 - Korg PS 3300 Replica Poly Synth
Native Instruments Kontakt Player Free Version
4Front Replica Fender Rhodes Electric Piano
Mono Fury - Korg Poly/Mono Replica
Ableton Live Vintage Melotron Replica