Basic online pixel font creator

I want an online tool for creating trueType pixel fonts. I found a website that does almost what I want - [login to view URL] --I have taken all of these files offline so you can work with these - the only thing missing is the server-side font generating code. However, this site only lets you create white/black squares on the grid, I want the ability to have 4 different shades of black/white. So : White - LightGrey - DarkGrey - Black Also a few little touches like having 2 draggable guide lines would be nice, but not essential. I would prefer a cheaper bidder without those features, but will choose a bidder who can do more for the same price. I will pay 100 dollars happily as that is the full budget. Needs to run online, with a secure user login screen, and a way for me to add/remove users (I can use mySql etc. ) Alex