You need a VST Host Application to be able to use VST plugins. Some plugins come as standalone applications.
- AudioMastermind - free VST instruments and free VST effects.
- KVR Audio - News and Resource site for open-standard audio plug-ins - Virtual Instruments, Hosts and Effects
- Blue Cat's Freeware Effects Plugins Bundle Pack (Win & Mac) - Chorus, Peak Meter, Flanger, FreqAnalyst, Gain Suite, Phaser, Stereo Chorus, Stereo Flanger, Triple EQ