Now Dieroller's interface is remodeled, so you can use it based on your operating system's interface (available for Windows Vista and above, Mac and GTK-enabled Linux distros).
The old interface is also available, through the "--old" parameter in the command line.
And now there is a command line mode: you can both use it to roll a singled die-set or to roll many ones: use "--comand-line" or "-c", a list of formulae is optional, after this, if not present, you'll be prompted to input one formula.
And, as you may imagine, the formulae must be like 2d20+5 (just an example, the modifier is optional).
Modifier implemented, though the algorithm may be improved. Working on a 1.1.1 version with improved code.
I'm working on a 1.1 version, featuring a very important thing: modifiers.
This new version will allow you to add a certain modifier (an integer value) to each die roll or to the total result, as you choose.
And still more features -even though some less important than others xD- to come!