>>303031A T/S lens, is a term used for a perspective changing lens used to get rid of converging vertical lines in architecture, or tilt the focal plane in your advantage, so you can take pictures of a whole fucking field of flowers. google it.
A lensbaby is a plastic lens with all sort of optical aberrations with the option of shifting the plane of focus, to create an ultra flat effect of making the universe look like it's made of toys. jk, that's what a real PC would do. the lensbaby just tries.
Also, both of these are way of trying to bring LF movements on to 35mm, which is usually nothing like what you've seen before. In a word, pretty amazing. also, look it up on flickr.
Learn to do some basic internet footwork.