Franz Keller has come up with Metal frame into which you clip an ipad and/or other music gear, turning it into a keytar.

From their promo material:
Sturdy hand cut plexiglass body holds iPad, Kaoss Pad and …

Presented with no comment, as the picture is self-explanatory:

This explains so much about the keytar and the platupus. The image is from a t-shirt design by Tenso graphics.
via reddit.

From the crazy-weird file, Steffest from Belgium has created a DIY cell-phone-keytar monstrosity. The Phone Guitar was born out of a presentation about mobile cross development that Steffest was working on.

He says:
Music apps …

Jordan Bartee is a musician, circuit bender and and electronic tinkerer. In a moment of insanity genius, he decided to grab a Commodore 64 and a MIDI keyboard, and then combine them with the …

Forest Terry Jr. (from the “Forest Power Band) came up with one of the stranger frankenstein instruments that I’ve seen in a while, and way back in 1974 he put out an album to show …

Do you want to be the center of attention and jump around at the front of the stage like your guitar player? Roland has just released the AX-Synth Shoulder Synthesizer – a combination keytar …