Die unmögliche Tatsache (Christian Morgenstern)
Friends, Romans, Countrymen (William Shakespeare, from Julius Caesar)
He Wishes For the Cloths of Heaven (W. B. Yeats)
Jabberwocky (Lewis Carroll, from Through the Looking Glass)
The Raven (Edgar Allan Poe), also translated to German:
A Collection of nice and funny German poems (starring: a Mördermarder and a Trüffelschwein).
Von den Drachen der Wahrscheinlichkeit [Beginn] (Stanislaw Lem)
Wie man ein Inventar erstellt (Umberto Eco)
Some of my favourite quotations are collected on my personal Page of Quotes. Some great collections of quotations (mostly in German) can be found on Worte-Projekt. The most extensive source of quotes on the WWW ist presumably Wikiquote, but there you should already have some idea what you are looking for.