I use Inkpad to sketch out vector graphics for my various projects. Then sync to my laptop via Dropbox and use inkscape to complete and the CLI tools to generat

I use Inkpad to sketch out vector graphics for my various projects. Then sync to my laptop via Dropbox and use inkscape to complete and the CLI tools to generate pngs. For simple things I can do all the vector stuff on the iPad. I use penultimate to pretty much replace my note books to sketch out new ideas. Task paper to plan projects. Numbers for various little spread sheets I still have to keep, e.g. tax, bills. Tab toolkit for well, tabs. One day I will get better at guitar again and record something on Garage band. Until then I use Garage band and the Apogee jam to replace all the effects boxes I could never justify buying. I've started drawing again thanks to Brushes. Occasionally Textastic to review code on the go. I can fix small things if I have to or write up pseudo code that I fix up when I get to my main machine. Some of this is not technically producing I suppose, but my iPad is now a very convenient part of my process.