When rebooting my HTC EVO 4G for the umpteenth time after a failed research project left it unstable, I wondered what in particular was determined to make my phone a brick. Before my inevitable flash back to a prior Nandroid, I needed a tool that would show me what was happening/hung up as opposed to showing me my custom boot animation, which was stuck in a never-ending loop.
Sadly, since I was away from a computer with ADB on it, I was forced to Nandroid back to a prior state and lose any progress I had made on my project. I still have no idea what was causing the problem, but I needed a phone more than I needed to know what was going wrong at that moment.
Enter Live Logcat Lite, an application that replaces your bootup animation with a more-or-less live log of what is going on during boot.
While some diagnostic bootup apps display pre-recorded animated boot information (they're just a fancy animated boot screen installer), Live Logcat Lite displays the same information you get from an "ADB logcat" command while your phone is booting up; this means if you're out in the real world, you just might have a chance of figuring out what app is stuck or slowing your phone's boot.
Live Logcat Lite is free, but if you like it you can pay $2 for the full version, which has some extra features.