Oomph is a designer friendly app development platform.
If you can happily use InDesign or Keynote, you can build apps with Oomph.
Adrian Stewart is one such Designer who uses Oomph Viewer to present his portfolio:
I gotta say I’m loving the Oomph platform. I’ve put my design portfolio together as an emag and it’s been SO handy to present my work on the iPad rather than carry a giant folder around. Plus, I can now easily show videos and after effects animations all in the one document, and it’s so simple to keep up to date. Absolutely loving the simplicity of it!