SciGraphica is a scientific application for data analysis and technical graphics. It pretends to be a clone of the popular commercial (and expensive) application “Microcal Origin”. It fully supplies plotting features for 2D, 3D and polar charts. The aim is to obtain a fully-featured, cross-plattform, user-friendly, self-growing scientific application. It is free and open-source, released under the GPL license.
Gourmet Recipe Manager
Gourmet Recipe Manager is a simple but powerful recipe-managing application. Gourmet is intended for the GNOME desktop environment, but works on any platform that gtk supports, including windows.
Gourmet allows you to collect, search and organize your recipes, and to automatically generate shopping lists from your collection. The latest version also allows you to calculate nutritional information for your recipes using the USDA food database (or entering custom information by hand)
It is important to know all the Linux alternatives to Windows.