Tusunga

Tusanga aims at providing you with just that simple-to-use calculator which solves your needs most of the time. There is no customization, no configuration, no setup or the like. If you are looking for individual solutions, you need to look somewhere else. The Tusanga calculator is a simple, standard, on-demand, Software-as-a-Service calculator accessible from everywhere over the web. Right where you need it. (Source: http://www.mathontheweb.org)