This week I'm playing PPTop (the first chapter) - although "playing" is a loose term for "waiting for the next click to become available".
Quite a bit of SquareIxion - but softcapping everything seems like lazy balancing, and the space issue is almost as bad as the blue colour used for prestige. YMMV, of course, and it's definitely worth a go if you haven't look at it yet.
Centaclick was really interesting! You have 100 clicks - how far can you get?
HackThePlanet was made for the recently-finished Summer Incremental Game Jam (all games here ) and I'm looking forward to playing the heck out of it once it's done!!!
Another from the jam above that I very much enjoyed was Neon Turbo Throwdown - a CCG with incremental elements. Finishable in a day if you plug away at it.