DirectWave

DirectWave - Image-Line's advanced sampler.

It's simple and easy to use. Has a very low CPU usage. Equipped with 2 filters, 2 LFOs, 2 envelopes and basic effects.

It has built-in unique VST Sampler tool which allows to create wav. samples program from any preset of any VST generator.

summary:

pros:

• low CPU usage.
• awesome VST Sampler tool
• ​built-in effects.

cons:

• a little outdated interface.
• lack of factory programs.

HOWEVER this plugin can also open SF2 and sfz files and allows easy edition of these programs. I got a lot of great instruments thanks to that.

The only thing I don't like is that it allows to load multiple programs but doesn't allow layering them - every multi program is locked to one MIDI chennel.