Abstract State Machines [more]
A formal method for specifying and verifying algorithms. Tools, meetings, researchers in the area.
http://www.eecs.umich.edu/gasm/

ACM SIGACT [more]
Special Interest Group on Algorithms and Computation Theory, the ACM special interest group for Theoretical Computer Science. Site has membership information, meetings, reports and a newsletter for members.
http://sigact.acm.org/

Algorithm Design Paradigms [more]
A course by Paul Dunne at the University of Liverpool. Slides and notes in HTML and PS.
http://www.csc.liv.ac.uk/~ped/teachadmin/algor/algor.html

Algorithms Archive [more]
A collection including searching, sorting, tracking, mathematics and cellular automata. In English and Italian.
http://editor.altervista.org/

Algorithms Courses [more]
Links to courses in algorithms maintained at various university computer science departments.
http://www.cs.pitt.edu/~kirk/algorithmcourses/

Algorithms in the Real World [more]
Notes for a course at Carnegie Mellon University.
http://www.cs.cmu.edu/~guyb/realworld.html

Analysis Of Algorithms [more]
An initiative of attendees of the 1997 Dagstuhl seminar, these pages provide research papers, a bulletin board, and links to researchers and other resources in the field. The focus is on average case and probabilistic analysis.
http://algo.inria.fr/AofA/

CATS: Combinatorial Algorithms Test Sets [more]
Searchable index of problems, links and methodology.
http://www.jea.acm.org/CATS/

Combinatorial Algorithms [more]
Lecture notes of a course at San Diego State University.
http://www.eli.sdsu.edu/courses/fall95/cs660/notes/

Combinatorial Algorithms [more]
Course material, syllabus and notes for a course by Roger Whitney at SDSU.
http://www.eli.sdsu.edu/courses/fall95/cs660/

Computer Programming Algorithms Directory [more]
Resources that describe computer programming algorithms.
http://www.algosort.com/

Data Structures [more]
Introduction to data structures, with Java code, by Peter M. Williams.
http://www.informatics.sussex.ac.uk/courses/dats/dats.html

Data Structures [more]
Lecture notes by Steven Skiena.
http://www.cs.sunysb.edu/~skiena/214/lectures/

Design and Analysis of Computer Algorithms [more]
Lecture notes; applets and code in C, C++, and Java; links regarding books, journals, computability, quantum computing, societies and organizations.
http://www.personal.kent.edu/~rmuhamma/Algorithms/algorithm.html

Dictionary of Algorithms, Data Structures, and Problems [more]
A dictionary of algorithms, algorithmic techniques, data structures, and archetypical problems, with related definitions. Many entries have links to implementations, tutorials, and bibliographical references.
http://www.nist.gov/dads/

Huffman Coding Algorithm [more]
Includes a guide how to build it and a JAVA tutorial how to use it.
http://www.huffmancoding.com/david/algorithm.html

Introduction to Quantum Algorithms [more]
A introduction to quantum algorithms by Matthew Hayward for those new to the field and who do not have a physics background.
http://alumni.imsa.edu/~matth/quant/299/paper/

On the Road to Algorithms [more]
Information on algorithms such as Bubble Sort and Random Number Generation, using HTML, Java and Perl. Collected by Lam Ka Chun (Raymond).
http://www.hlcmklam.com/

OOPWeb Algorithms Directory [more]
Algorithms lecture notes, courses, tutorials, references, guides and online books.
http://www.oopweb.com/Algorithms/Files/Algorithms.html

Pattern Matching Pointers [more]
A collection of links for and to researchers in the subject.
http://www.cs.ucr.edu/~stelo/pattern.html

Problems in Analysis of Algorithms [more]
A list of open problems with updates and solutions.
http://algo.inria.fr/AofA/Problems/

Resources for the Analysis of Algorithms [more]
Links to papers, conferences and other sites, maintained by Helmut Prodinger.
http://math.sun.ac.za/~prodinger/

Self-stabilizing Algorithms [more]
A project to create tools for developing and testing self-stabilizing algorithms.
http://www.sphere.pl/~kuszner/self-stab/

Softpanorama Virtual Library [more]
Section on Algorithms and Data Structures. A compilation of links.
http://www.softpanorama.org/Algorithms/algorithms.shtml

Stony Brook Algorithm Repository [more]
This is a collection of implementations for 75 fundamental algorithms problems, including data structures, numerical and combinatorial algorithms,graph algorithms, and computational geometry. Implementations are available in C++, Java, Fortran, and other languages.
http://www.cs.sunysb.edu/~algorith/

The Algorithm Base [more]
Database of algorithms. May be scanned through or can be questioned through a knowledge based assistant. Links to originating web sites.
http://www.intelligenceunited.com/index2.html

Tree Automata Techniques and Applications [more]
An evolving web text in PostScript and PDF, with related software.
http://www.grappa.univ-lille3.fr/tata

Web Data Structures and Algorithms [more]
Lecture notes and links for a course by Godfried Toussaint.
http://cgm.cs.mcgill.ca/~godfried/teaching/algorithms-web.html