Basics of Computational Number Theory - Notes and Javascript illustrations by Robert Campbell. www.math.umbc.edu/~campbell/NumbThy/Class/BasicNumbThy.html
CLINT - Hugh Montgomery's Computational Laboratories in Number Theory. TeX files and Pascal source code. ftp://ftp.math.lsa.umich.edu/pub/clint
Computational Number Theory - Lecture notes by Robert Campbell, December 1997. www.math.umbc.edu/~campbell/NumbThy/Class
Computational Projects in Number Theory - Interesting problems, usually requiring extensive verifications or enumerations, to occupy the idle CPU time of workstations and personal computers. Compiled by Tomás Oliveira e Silva. www.ieeta.pt/~tos/hobbies.html
Implementations of Extended LLL - Links and notes by Wilberd van der Kallen. www.math.uu.nl/people/vdkallen/lllimplementations.html
LLL Page - Maintained by Keith Matthews. www.maths.uq.edu.au/~krm/lll.html
The LLL Algorithm - Papers on the LLL algorithm and its applications collected by François Koeune. www.dice.ucl.ac.be/~fkoeune/LLL.html
Visible Euclidean Algorithm - Enter two positive integers, and click the button to see the operations of the Euclidean Algorithm. www.math.umn.edu/~garrett/js/gcd.html