Bedroom Producers Blog have published a big list of the 40 best freeware synths and effects released in 2014. I picked up a few through the year but it turns out I missed a lot of great ones like Hysterisis by Glitchmachines. It’s been a great year for free plugins.
There’s also a list of the best from 2013
PS – the list doesn’t include limited time offers like Replika from NI. Man that’s a great delay. Get it before the end of the year. http://www.native-instruments.com/en/products/komplete/effects/replika/