Pedro's Tulio Quick Release Multi Tool
The Pedros Tulio Multi Tool Q/R skewer is the multi tool that you can not forget. The 8 function multi tool includes 4, 5, 6, and 8mm hex wrenches, #2 flat-head screwdriver, chain tool (single-speed -11 speed compatible), two spoke wrenches (3.23mm and 3.45mm), and all while serving as your rear quick release.
Although it is kind of ludicrous, I can't help but really love this tool. It puts all the true essentials of a multi-tool in a permanent position on your bike. It is literally unforgettable. I know that I've railed against chain tools without independently rotating push pins in other reviews. Portables are an exception in my book. Usually, if you're doing trail side chain maintenance, you're going to replace that chain when you get home anyways. So the long-term integrity isn't so important. It's like one of those crappy spare tires on cars. You just need to limp home. So you keep this skewer on your rear wheel, and then all you need to pack is a flat-fix kit and you're all set.