PrintCalc is a 3D print calculator under active development. Currently you are able to store your filaments including their costs and input the filament length required to complete a print. Based on inputs, PrintCalc will estimate the cost to complete a print. See http://rejectedfreaks.net/index.php?title=PrintCalc for complete details, as well as future features. If you experience any bugs or issues please let me know and I'll be sure to fix them as soon as possible!