kHS One is one of my favorite VST synths and it is currently on sale 80%.
It looks like simple subtractive synth but has thick analog sound and is really good for variety of bass and leads sounds.
It has really simple interface and it is very easy to program it. With 2 oscillators and one sub-oscillator it is capable of variety of sounds from Moog-ish bass lines to virus-like supersaws.
Check it our while it is 80% off at Plugin Boutique
Description from kHs website:
kHs ONE was not designed to be a fat analog beast with a massive warm sound. That just happened anyway.
We have put a lot of time and effort into making oscillators and filters of the highest quality which gives kHs ONE a pleasantly warm and analog sound.
Working with professional musicians and producers throughout the development process, we have made sure that the sound meets their high standards.
2 Oscillators (saw/square/noise)
Per voice wave shaper
3 Envelopes (amp/filter/mod)
8 voice unison
24 voice polyphony
Env/LFO legato on/off
Onboard FX: Chorus, Delay, Equalizer and Limiter