Reaktor ensemble for formant shifting / formant reconstruction for *polyphonic* input, spectral warping, reharmonizing, freezing, and pitch shifting. From the User Library.
Soundgrain is a graphical interface where users can draw and edit trajectories to control granular sound synthesis.
THESE ARE ALL FREE.
Install on Win 10 64 Bit: Use 32 Bit version and move (/create) folder Program Files(x86/Vamp Plugins and copy plugin data into there.
You can get some really nice drum samples from Past To Future (Including free ones).
Random Riff Generator is a midi tool by Mario Nieto that generates sequences for you. This is the free version.