These guys are the best:
Good night and good luck…
http://www.viswiser.com/training - A nice free (not only UML) source with visual paradigms. :)
There’s a good and quick fix for loops in sequence diagrams: http://www.informit.com/articles/article.aspx?p=169507&seqNum=2
Metro UI CSS – a set of styles to create a site with an interface similar to Windows 8 Metro UI. The set of styles developed as a self-contained solution, although it can be used as an addition to any other CSS framework.