The instruments on this page are free to download and can be used without any limitations. In some cases, you will need to create an account using your email address to access the files. A few of them are donationware, so please contribute to the developers if you can.
I have selected these plugins for their quality and stability based on my own experience. In my opinion, they are as good as the stock plugins that come with Ableton Live, FL Studio, Logic Pro X, Cubase etc.
Instruments marked with an * are only available as part of a bundle, which can be GB in size but are well worth installing.
Watch my video tutorials about getting creative with VST instruments and effects.