Allows multiple conditional tests to be performed (e.g. if this equals that AND if this contains that AND this is empty, do such-and-such).

Can compare values of pretty much any TXP field, custom field, URL or server variable with any other variable (or fixed text of course) using a variety of conditional operators including equals, <, >, <=, >=, not, begins, contains, isempty, isused, defined, undefined, isnumeric. Also compatible with <txp:else />.

Not the prettiest plugin in the world, but powerful enough to get you out of a jam.