PiHex
- Distributed computing project calculating specific parts of Pi in Hexadecimal system. Project is now concluded.
- http://oldweb.cecm.sfu.ca/projects/pihex/

Roy's Pi Page
- A Program in C to compute the famous transcendental, and some remarks on making it work with the Borland Turbo C++ and other information on Pi.
- http://www.ballandclaw.com/upi/pi.html

HiPiLib - High Performance Libraries
- Home of PIOLOGIE, a library for arbitrary precision arithmetic, operating on natural, integer and rational numbers. Also used for calculating pi.
- http://www.hipilib.de/

Archimedes And The Computation Of Pi
- Java applets illustrating Archimedes' construction graphically and interactively.
- http://www.math.utah.edu/~alfeld/Archimedes/Archimedes.html

Martin's Pi Page
- Provides a program and explanation for pi computations.
- http://freespace.virgin.net/martin.mamo/fpi.html

Austin's Wasted Cycles
- Austin's Wasted Cycles is a CGI which computers either pi or factorials over the web.
- http://havoc.gtf.gatech.edu/austin/legend/useless/numbers.shtml

Jasonp's Pi programs
- Huge supply of different pi programs known as well as links to most of the unknown ones.
- http://www.boo.net/~jasonp/pipage.html

Armpi 4 for the ARM processors
- Armpi 4 is a program that calculates pi in decimal for the ARM processors (in particular for the Acorn Risc PC).
- http://www.vinc17.org/acorn/armpi/armpi4/index_eng.html

efg's Computer Lab: Buffon's Needles Lab Report
- A project describing how to estimate the value of pi using Buffon's Needles. Includes math description and complete Delphi source code.
- http://www.efg2.com/Lab/Mathematics/Buffon.htm

SourceForge.net: Project Filelist
- List of downloadable source code of open source programs to compute Pi.
- http://sourceforge.net/project/showfiles.php?group_id=54167

Stu's pi page
- A fast program to compute Pi and a comparison with other programs run on windows.
- http://home.istar.ca/~lyster/pi.html

The Hfloat Page
- Algorithms and software for calculating pi and e.
- http://www.jjj.de/hfloat/hfloatpage.html

Pi at Multiple Dimension
- Online Php program that lets you verify that pi is same in 2d 3d and 4d.
- http://projectpi.sourceforge.net/2d3d4d_o.php