LoL Runepage Calculator
This tool is available to test different runepage setups away from the League client, and also to provide the total cost of runes used, which is not given inside the official Riot version.
Expand/collapse each rune group (Marks, Seals, etc) by clicking on it's title. Click a Rune (left or right click) to add or remove it from the active Runepage.
Hold 'Ctrl' while clicking to add/remove the maximum possible runes, or to expand/collapse all rune groups.
This tool was built partially out of a desire to see the full effect of mastery pages. Currently, Riot's mastery pages do not give users a separate view to show them how their statistics are being affected.
While this does make sense because masteries very rarely overlap, I think it's helpful to have the changes organized in a different way, and thus, this tool was born.
Credit for the 'Share' feature, the original mastery data, and image assets goes to FinalesFunkeln.com & dpatti