You know why I like Twitter's Bootstrap? Because of the Icon gallery
I don't know what about you but for me it was always a challenge finding a nice icon gallery that fits my application needs. I used several commercial libraries but even then I found the supplied icon gallery to be quite limited
Bootstrap has a nice icon gallery which are vector based (not pixel) which means you can enlarge each image and quality is kept.
So, why am I telling you about it? Bootstrap is not new to anyone
Well, I just found that they add additional images to their icon gallery and now they offer images for displaying menu buttons for mobile applications. You need to scroll down to the bottom of the list
Cool, right ? These are the exact 3 icons that were missing from Bootstrap from day 1 and some developer implemented them using raw HTML (it is possible because basically they consist of lines and dots which can be simulated using DIV and border radius)