Flash tools and apps.
At some point Flash became an important video wrapper and then it got ruined IMO since there are many tools that are developed for Flash and people just always care about video bah.
Anyway, we use a tool called splunk at my company to sort server logs and it presents much of its information in dynamic Flash charts. I'm the only guy at my office that can check those tools on his mobile phone, and that's quite useful. I also do very advanced product simulations with Flash and can show them off at any time with my phone. Sure, many will think "but you can do that with HTML5." Yes, and no.
If it's strict code, HTML5 will do. When you get to do complex graphical animations and code, Flash will beat HTML5 any day of the week. For instance, one of our products is a specialized software for compact PoS machines, such as Hypercom terminals. In a recent RFP, our rival company was showing it off in the tiny terminals. I just fired off a Flash app that I developed which is a full simulation of the terminal with the software, including all the physical functions that aren't simply on the screen, such as a the physical buttons (and all their functions within the app), and a demonstration of the receipts being printed and the information on them on a huge monitor that everyone in the presentation could see at once. Guess which company won the proposal? And when I was developing it, most didn't care for my demo, but I did get to show it off to the CEO during a lunch break on my phone and he loved it.
So yea, Flash is a huge deal that gets maligned by bad developers that just put a badly coded ad with some crazy loops in them...