I used to be a huge TLC fan (more for Left Eye I think).
Anyway, TLC released 3D after Lisa died. Only one of the songs featured Left Eye on it properly and the other ones with her raps were simply taken from older songs or Left Eye's solo work (Supernova). 3D was very hit and miss. Some of the tracks were very poor for TLC.
They also released Now and Forever... the Hits (my name is in there with some cheesy comment

)
They released a few singles after Left Eye died; Girl Talk, Hands Up, Turntable and Damaged. Despite not doing so well, they still managed to have decent videos.
That O'So Krispi girl was just for the show, apparently. The song they released with her was dreadful.
I still like CrazySexyCool, but not so much the rest.
Left Eye really was the soul of the band, methinks and she also had a habit of making peole successful (Mel C's first number 1 was with her... Donnell Jones had his only real hit with her etc).
There was rumours that Chilli was going solo but I don't follow them anymore. T-Boz had a few of her own songs dotted about, but that was when she was part of TLC.