Abyss
Technical dive planning and hyperbaric simulation software available in multiple languages; supports all breathable gases.
http://www.abysmal.com/

Casuarina Aquatics, Inc.
Software for planning technical scuba dives and for training divers in the physics and physiology of diving. Also provide scuba instruction and dive travel for training and recreation.
http://www.casuarina-aquatics.com

DCA 2000
Professional software solution for the administration, marketing, and monitoring of small and large dive centers. Available in English and German.
http://www.worldservice.com/dca

Dive Computer Interfaces
Plans for homemade interfaces for Mares dive computer, free software, and links.
http://www.geocities.com/scubax.geo

Dive Table Formats
Offers 9 different dive table formats in both metric and imperial.
http://www.flash.net/~table/table/index.htm

DiveLogOnline
Free online scuba dive log book for divers.
http://www.divelogonline.com

Gas Absorption Program
GAP is a free downloadable decompression program that utilizes unpadded bulhmann's decompression algorithm for mixed gas decompression.
http://www.gap-software.com/

Global Underwater Explorers
DecoPlanner utilizes gradient factor calculations, allowing safety factors and deep stops to be customized across multiple diving profiles for mixed gas diving.
http://www.gue.com/decoplanner/

Immersions
Internet Dive Log is a web-enabled scuba diving application. Free demo download available and allows up to 20 dives to be recorded. Also offers video production and travel services.
http://www.immersions.com

Internet Dive Log
IDL is a complete scuba diving application, tracking all aspects of diving, and works with all major brands of dive computers. Still Beta testing and free.
http://www.immersions.com/idl

ReefNet Software
Software for divers and fish watchers and dive logs.
http://www.reefnet.on.ca

ScubaTrac Databases
A database in Access 97/2000 for scuba instructors and dive centers to keep track of students and clients. Designed in the form of the PADI Student Record File. Student profiles, mailing and email lists, and courses and travel in printable format.
http://members.home.net/greynolds26/scubatrac

Sea Wolff Diving Software
Dive Log for Windows. Useful software for instructors, SAR Teams and Divemasters.
http://www.seawolff.com

Technical & Recreational Divers Support
Technical and recreational custom air, nitrox and mixed gas decompression software.
http://www.diverssupport.com

Voyager Desktop Decompression System
Full featured decompression planning software allows you to plan and execute dives more intelligently, safely, and efficiently. Complete table generation and bailout schedules for all gas mixtures and depths. Suited to all levels of expertise. Available for Windows 95 and Windows 3.x.
http://www.divevoyager.com

ZPlanner
Free downloadable windows-based graphical decompression software package for calculating mixed gas dives.
http://www.coastnet.com/~powercheck/zplanner.html