This-thing-with-a-thing-and-a-whatsacallit?

I've just came back from holidays with some macro photographs of nature I really like. I am, however, by no means a biologist, thus I lack the knowledge to name them properly. If anyone can provide me with information WHAT did I actually shot, please do, and I will be obliged to buy you a pint when we meet. Obviously, people I know in person are privileged, but where would we be without some healthy nepotism?

The shots, each of them worth a pint:

some kind of spider another shot of the spider
yellow flower identified as Impatiens noli-tangere by
purple flower identified as Campanula trachelium by
moss
mushrooms