Live Demo : http://anshabhi.github.io/dubcen/
DubCen is a collection of 50 calculators and a multi feature unit converter, which can convert 23 quantities and over 1000 units. DubCen is available for free under GNU License.
Just open the "index.html" file to get started.
A JavaScript enabled browser is required to use DubCen. In offline mode, only a few browsers support "localStorage", which is used to store history in DubCen. Among the commonly used browsers, only Google Chrome supports localStorage in offline mode, and thus we recommend Google Chrome as the best browser to be used with DubCen.
The favourites feature is still in beta version. Please report any troubles directly to us here.
If you want to make any requests for new calculators/converters please open a new issue.