+1
The remaining free VIs in this family currently are: Amplified Cello Quartet, Charango, Choir, Drums, Electric Piano, Frozen Strings, Soft Piano, Strings and Synth Pads.
You access them via the LABS VST. The UIs are all the same: 2 slides and 1 rotary knob. The parameters they control vary from VI to VI.
Kontakt NOT required. LABS is the host. Nice!
I think it's terrific of Spitfire to package existing samples with additional new processing into these little freebies. First rate!