One of the most popular plugins is newblue fx and sapphire.
They're very helpful, but sometimes glitchy. What they do is give you access to more effects for your edits.
SAPPHIRE LINK
http://ask.fm/FloraMarieB/answers/114707531513
NEWBLUE LINK
https://youtu.be/59A8_5rk7So
you'll have to install the crack, multikeygen, and everything else on a browser other than chrome for newblue.
When you open svp, you should have new effects with
"NewBlue V3 ...""S_..."
- brianna