Global Underwater Explorers - Equipment utilizing gradient factor calculations, allowing safety factors and deep stops to be customized across multiple diving profiles for mixed gas diving. Technical & Recreational Divers Support - Technical and recreational custom air, nitrox and mixed gas decompression software. Gas Absorption Program - GAP is a free downloadable decompression program that utilizes unpadded bulhmann's decompression algorithm for mixed gas decompression. 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. 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. Sea Wolff Diving Software - Dive Log for Windows. Useful software with versions for divers, instructors, SAR Teams, and Divemasters. Travel Diver - Free online divelog for those that register. Includes features, message board, and classifieds. 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. ReefNet Software - Software for divers and fish watchers and dive logs. SharkPoint - Scuba divers logbook designed for the recreational divers. Diving Log 4.0 - Logbook software for scuba divers with statistics, download and import functions and a report designer to print your own logbook. Multilevel 1.9 PDA - Multilevel is a free Java-based decompression and dive planning software that also includes a passive-addition rebreather module. eDiving - Virtual diving simulator. V-Planner - Decompression software which uses a VPM bubble model with deep stops inbuilt. Can set conservatism levels, create lost gas and bail out plans, extended stops, and air breaks.