A Mathematician's Links  
Mathematics Archive (Lots of documents about lots of mathematical subjects.)
History of Mathematics (Really complete archive of the History of Mathematics with lots of biographies.)
Technische Mathematik (List of all maths courses of the Technische Universität Wien.)
Mathematical Sciences (Homepage of the Mathematical Sciences Department of the Loughborough University.)
 

A Mathematician's Humour  
Stefan Winkler's Humour Collection (Stefan Winkler happens to be my elder brother, and although his humour collection does not only cover mathematics / science, it contains so much so hilarious stuff, that I included it here.)
Science Jokes (Huge collection of science jokes.)
 
Maths Jokes:
    My compilation of maths jokes.
 
The History of Watermelons:
    Providing deep and profound insight in our sets of numbers.
 
Existence:
    Limerick about the existence of the sycamore tree.
 
Death of a Mathematician:
    Old mathematicians never die...
 
There's a Delta for Every Epsilon:
    Song about epsilontics by Tom Lehrer.
 
The Derivative Song:
    Song about derivation by Tom Lehrer.
 
Lobachevsky:
    Song about plagiarism by Tom Lehrer.
 
That's Mathematics:
    Song about mahematics by Tom Lehrer.
 
New Math:
    Song about New Maths by Tom Lehrer.
 
The Professor's Song:
    Song about professors by Tom Lehrer.
 
Die Grundlagen der Löwenjagd:
    Long and worth reading, but only for those who know German, I'm afraid. An even longer English version can be found here.
 
Proof Techniques:
    Common proof techniques that can be extremly useful.
 
The Secret to Wealth and Success:
    Enhancing Your understanding of life by the means of algebra.
 
On the Nature of Girls:
    This was sent to me by my ex-girlfriend after she had dumped me...
 

Maths and Romance  
If You've always thought that in maths there would be no place for feelings and romance, well, read on.
 
Calculust:
    Poem by Ken Feinstein.
 
Friendly Numbers:
    Numbers expressing amicable feelings.
 
Marriage Theorem:
    [Still to come].
 
"Happy End Problem":
    A problem in number theory with a truly happy end.
 
What is a kiss?:
    Professors asked about their definition of a kiss.
 

A Mathematician's Quotes  
Stefan Winkler's Quotations Collection (Stefan Winkler happens to be my elder brother, and although his quotations collection does not only cover mathematics / science, it contains so much so hilarious stuff, that I included it here.)
Mathematical Quotations (Really complete archive of quotations on mathematics.)
Mathematical Quotations (Another really complete and searchable archive of quotations on mathematics.)
 
Maths Quotes:
    My compilation of amusing maths quotes.
 
Relations among Texts: Quotes:
    My compilation of quotes on statistical linguistics.
 
    Since I have a counter, I GET A KICK OUT OF YOU: 
 
    Back to my Willkommen! Bienvenue! Welcome! Homepage.