Has done up some spreadsheets for 40K Army Building. If you're looking for him, you're probably looking for them.
4e Eldar Spreadsheet Statblocks update on the fly depending on model wargear.
A Shitty Necromunda Spreadsheet It has dropdown menus for selection of options, but it's pretty bare-bones.
Sheets made by other users. Might be useful.
Mahjong Rules Quicksheet (For the hell of it)