It's (very) fugly, but for the moment this is the only way I can list all the existing tags. At least there is a counter for the number of uses... (and it's alphabetically sorted!)

Portugal (1), academia (2), computers (3), english (7), life (2), mathematics (1), photography (5), politics (2), portuguese (1), travels (2)

And now, a list of all posts, sans pagination.