Some good resources for free virtual synths, samplers, etc.

Free VST Plugins are one of the most exciting things about mixing. In the past it was impossible to imagine that so many quality tools could be available at no cost. Today there are more great free plugins than ever before, but the freeware scene is always changing. Iris 2 is a powerful, one-of-a-kind tool that pairs high-quality digital signal processing for resampling, modeling, and effects along with remarkably flexible modulation options, resulting in a lot of complex math and data streaming that needs to happen quickly. RICH has rendered most of my go-to mastering plugins obsolete at a fraction of the cost. I was able to match and even better the results of previous mastering plugins in a fraction of the time with RICH’s intuitive and effective controls.”.

Plug in Boutique: https://www.pluginboutique.com/categori ... ?free=true
KVR http://http://kvraudio.com/plugins/wind ... st-popular
Bedroom Producers Blog https://bedroomproducersblog.com/free-vst-plugins/ Vst

Least Cpu Taxing Plugins Vst Downloads

VST4Free: http://www.vst4free.com/index.php?m=VSTi
Some of the popular paid sampler programs are available as free introductory versions with limited instrument samples, but often still offer some great sounds for free.

Least Cpu Taxing Plugins Vst Plugin

You might be interested in Sampletank CS Free for example (64 bit only I believe.)
http://www.ikmultimedia.com/products/sampletankcs/

Least Cpu Taxing Plugins Vst Plugins

Another popular platform is Kontakt free player:
https://www.native-instruments.com/en/p ... -5-player/
(Full disclosure, the interface isnt for everyone. Personally I find it very unintuitive and frustrating.)
I'll leave the virtual synth recomendations to others.