Center One is a really unique plugin that lets you change the level of center vs. sides with some other bonus features that help it do pretty transparent work. Nice for cases when a remix isn’t possible but something isn’t quite right.
Their DynOne multi-band is heavily influenced by the TC system 6000 multi-band comp that was very popular and useful.
StageOne is their newest plugin which to my ears is like Bob Katz’ K-Stereo plugin but more useful.
So far Leapwing is 3 for 3 in making plugins I had no idea I needed or wanted but have ended up purchasing all 3. Really unique stuff and good customer support.