Don't say time machine, huh?
Okay.
A time traveling 1981 DMC DeLorean.

Fart shotgun with fart's ammo

Rechargeable shields.

a cure for loneliness of spirit....

The doomcannon.

I would like to invent a device that destroys all branching universes at the moment of their creation, and works retroactively. Then I could actually be sure this was the only universe in existence.

I you wish to make an apple pie from scratch you must first invent the universe.

The sub-genre of being a Psychologist, which implements psychedelic therapy. Basically modernized shamanism.

A PC that can play all console games using XBOX 360, PS3, and Wii U discs in a Blu-ray optical drive or digital downloads from an online game store. Then you can play games like New Super Mario Bros. U, Halo 4, and God of War 3 on the PC.

Originally posted by banzaigtv:

A PC that can play all console games using XBOX 360, PS3, and Wii U discs in a Blu-ray optical drive or digital downloads from an online game store. Then you can play games like New Super Mario Bros. U, Halo 4, and God of War 3 on the PC.

That would be a legal nightmare, but alright. =P

I'd like to invent some kind of powerful virtual reality device.

I'd like to create a holographic force field.

Made out of hexagons.

Nessesity is the mother of invention. I would like to invent something that makes me a lot of money, which I would like, by catering to someone else's need.

TOILET UNDERWEAR

Originally posted by Sanchez the dead skeleton:

TOILET UNDERWEAR

I dunno if that would sell as well as this

http://www.youtube.com/watch?v=HFzTm6fy_zs

a pair of bio-mechanical wings that can be inplanted in someones back so they can fy!