Inventions that I wish someone could make for me:

• A 4 mm thick see-through plastic ruler that had a metal edge for cutting with an exacto knife, where the numbers are printed backwards to be seen through onto the other side and the metal strip on the edge has a nice lip making it less easy for the blade to slip onto the ruler...
• A scanner that's as thin as the iPad that can slip between the pages in a book without having to bend down its spine that can scan in detail two opposite pages at the same time clearly. Flatbed scanners would be a thing of the past.
• You know how you can rent a tux for a nice event, what if you could rent beautiful art frames that would cost too much to own for a month and a half, the length of a show, I don't even mind if it has fake pockets, but I'd love if I could walk into a store, get it sized and walk out with a tailored wooden frame.
• A DIY kit for making a steadycam holder for an iphone to take video
• Pants with built in or insert-able wool leg warmers near your ankles
• This isn't so much an invention as a business plan, but what if there were bars (restaurants would be pushing it) where you could only stand, but booths and everything else was still the same? As annoying as it may seem, most of us do that in crowded bars anyways.

Yeah, I just want stuff that will help me do other stuff.

Also, I just learned about the Xcode environment that uses PhoneGap to make my own apps, both are free!
But you may just need a developer account for $100 a year.