This question is just the latest of many where I have had to say something along the lines of By the way, you specified open-source, but unless you plan to change the code, then gratis will open more possibilities if you are just looking for something that you don't have to pay for I ca...

I really like the tick marks in some answers on this question. However, they are being created by imgur images. Is it possible to expand our markup to add a green circle with a tick and a red circle with a cross (maybe a few others, like question mark)? Maybe this could be used on some other s...