pdr (personal data recorder) and pdx (personal data expert) are applications that collect and evaluate mostly numeric personal data. The intended use case is for logging individual medical data (blood sugar, blood pressure, body temperature, weight, heart rate, and medications), but they can also be used for technical, sports, fitness, weather, environmental, or financial data. They work on a continuous flow of numbers in time that you want to monitor. Every data item can also be commented by text. pdr can use Twitter and email accounts for data input, which makes mobile phones usable for data input. It is one of the few free applications for diabetics.
FreeDiams is a program for making prescriptions of pharmaceutical drugs and testing their interactions. It is the result of building the FreeMedForms prescriber plugins into a standalone application. It is developed by medical doctors and is intended for use by these same professionals. It can be used to prescribe drugs and test drug interactions within a prescription. It can be linked to any application by way of its command line parameters. FreeDiams can use several drug databases, including the FDA_USA drug database, the French AFSSAPS drug database, the Canadian drug databases, and the South African drug database (SAEPI).
Diet Monger Ass Kicker (DMAK) helps the user design diets according to the user's specifications. The EuGTK version of DMAK, unlike the wxEuphoria version, does not require a *.so file, which was a problem for some people. It uses USDA data, and does sorting and filtering and calculations, and has Google search features, and gives you virtually all knowledge known to man about 7500 foods and 140 nutrients. It uses *.req files, which you can create or edit, and which determine the nutrient requirements. It remembers your settings. It has file features and clipboard features. Documentation is thorough. You can upgrade the data every time the USDA updates their data.