i'm trying to map my whole application in a UML diagram and i wonder what diagram type i should use.

im not doing this in class level, rather from a bird eye's perspective.

1. single application object (patterns: singleton)(examples: CodeIgniter application) that composes
2. multiple module objects (patterns: singleton, facades)(examples: guestbook, addressbook) that compose
3. multiple low level stand alone objects (examples: mysql mapper, doctrine mapper) that compose
4. various 3rd and in-house libraries (examples: doctrine, solr, xml-parser)

what UML diagram is suited for this kind of overview presentation?

thanks