A SCUBA gas mixing application. Computes required amounts of oxygen, helium, and top-up gas (air or something else) to mix nitrox and trimix. Also computes MODs, EADs, ENDs, and best mixes.
An app that maintains a database of SCUBA cylinder sizes and capacities. At the moment, this is merely a standalone piece of Gas Mixer and doesn't do much by itself, but other apps in the future may use it as well.