I've read a couple of questions recently about tabular environments, and it seems there's a whole bunch of packages that do stuff in this field. I'd really like a summary of what each package does, and which conflict.
For example a quick google (plus my memory) got me tabularx, booktabs, multirow, collcell, array, mdwtab, longtable, supertabular...
Which should I be using for what purposes? And more importantly, which conflict?
[Should this be CW? One package per answer sort of thing?]