Golomb Rulers
- Table of lengths of shortest known Golomb rulers, counts of optimal and near-optimal rulers, and some Fortran programs for dealing with Golomb rulers.
- http://researchweb.watson.ibm.com/people/s/shearer/grule.html

Orthogonal Arrays
- Lists of orthogonal arrays, difference schemes and experimental design tools maintained by Warren F. Kuhfeld.
- http://support.sas.com/techsup/technote/ts723.html

The Search for a Finite Projective Plane of Order 10
- By C.W.H. Lam.
- http://www.cecm.sfu.ca/organics/papers/lam/paper/html/paper.html

Modular and Regular Golomb Rulers
- Detailed, theoretical tutorial with references.
- http://cgm.cs.mcgill.ca/~athens/cs507/Projects/2003/JustinColannino/

Mathematical Association of America - Math Games: Rulers, Arrays, and Gracefulness
- Ed Pegg Jr. writes about the history (and future) of Golomb rulers and related concepts.
- http://www.maa.org/editorial/mathgames/mathgames_11_15_04.html

Distributed.net: Project OGR
- Describes the computerized effort to prove that the known shortest Golomb rulers (up to 25 marks) are really the shortest, or else find the actual shortest ones.
- http://www.distributed.net/ogr/

Mathworld - Golomb Ruler
- Description and theory, with references to additional reading.
- http://mathworld.wolfram.com/GolombRuler.html

Blocks and Design Applet
- Fractional factorial design generator by Marko Boon.
- http://www.win.tue.nl/statlab/designApplet.html

The Hadamard Maximal Determinant Problem
- List of known {-1,1}-matrices with largest determinant and D-optimal designs.
- http://www.indiana.edu/~maxdet

Golomb Rulers - The Search For 20, 21 and 22!
- The search for optimal Golomb Rulers with 20, 21 and 22 marks.
- http://members.aol.com/golomb20/

Hadamard Matrices
- A library of Hadamard matrices maintained by N. J. A. Sloane.
- http://www.research.att.com/~njas/hadamard/

Bill Cherowitzo's Hyperoval Page
- Hyperovals in Desarguesian Planes and related structures in arbitrary projective planes.
- http://www-math.cudenver.edu/~wcherowi/research/hyperoval/hypero.html

SOMA Update
- Leonard Soicher reports on new SOMAs, which are generalisations of mutually orthogonal latin squares.
- http://www.maths.qmw.ac.uk/~leonard/soma

Small Association Schemes
- Tables of homogeneous coherent configurations by A. Hanaki and I. Miyamoto.
- http://kissme.shinshu-u.ac.jp/as/

Some Constant Weight Codes
- As orbits of AG(2,q), PSL(2,2^f) and PGammaL(2,2^f) by Yves Edel.
- http://www.mathi.uni-heidelberg.de/~yves/Matritzen/CWCodes/CWCode.html

Orthogonal Arrays and Covering Arrays
- Construction of orthogonal arrays and covering arrays using permutation groups by George Sherwood.
- http://home.att.net/~gsherwood/cover.htm

Caps in Finite Geometries
- Tables and examples in PG(k-1,q) by Yves Edel.
- http://www.mathi.uni-heidelberg.de/~yves/Matritzen/CAPs/CAPMatIndex.html

Library of SBIBD
- Compiled by Jennifer Seberry.
- http://www.uow.edu.au/~jennie/SBIBD.html

La Jolla Covering Repository
- A database of good covering designs constructed by Dan Gordon.
- http://www.ccrwest.org/cover.html

Ted Spence's Home Page
- Classification of Hadamard matrices and designs.
- http://www.maths.gla.ac.uk/~es/

StatLib - Designs Archive
- With programs and algorithms for creating designs for statistical experiments.
- http://lib.stat.cmu.edu/designs/

Handbook of Combinatorial Designs
- Home page for The CRC Handbook of Combinatorial Designs.
- http://www.emba.uvm.edu/~dinitz/hcd.html

Design Theory Resource Server
- A research project founded by the UK Engineering and Physical Sciences Research Council.
- http://www.designtheory.org/

Design Theory Lecture notes on the Web
- Links compiled by Peter Cameron.
- http://www.maths.qmul.ac.uk/~pjc/design/notes.html

Design Resources
- Links to resources for design theory maintained by Peter Cameron.
- http://www.maths.qmw.ac.uk/~pjc/design/resources.html

Library of D-optimal Designs
- Compiled by Jennifer Seberry.
- http://www.uow.edu.au/~jennie/D-optimal.html