For texturizing, I like Bigseq2 by Audio Damage, Truc2 and others by De Le Mancha, Sonitex by Tone Projects, Zebrify (advanced users only!) and Fabfilter Saturn for saturation and gluing it all together.
I've got a "rubbery" sound by judicious use of sample rate reduction myself, but that might be a different type of rubbery to what you want
I've never tried it, but if you're after a quick way to change sounds and instant gratification, this product claims to do that:
http://www.kvraudio.com/product/relectro-by-linplug
