Do a Google search for "free vst" there are too many for me to post here. There is free stuff all over the web. Search "free plugins" too.
Also there are people on Ebay selling what are actually free files but what they have done is collected hundreds of free plugins, VST's, synths and sll sorts of stuff and put them on one disc and they sell it for about $15. Sure you can get the stuff free too, but to me it's worth the small amount of money for the convenience. Many of these discs are sorted and archived into folders by file types as well. They also include many free tools on them that work very well, and about as well as anything else for a newbie that can't yet use any advanced features of the expensive stuff. There are free 32 track studios, etc. Everything that you need to create and record music, and have it sound good too can be had for free on the web. Legally. Search on Ebay for "plugins" or vst and limit the search to items under $20 or so and you will find some. They are not to be confused with "warez" etc. these are legal shareware or freeware files.