Adobe's Kuler app for iOS (iTunes Link) is a relatively simple and useful app. Take a picture and select a color palette from the image. Your color scheme is then uploaded to Adobe's Kuler site where you can download an .ase (Adobe Swatch Exchange) file.
If you aren't familiar with .ase files, they allow you to share color palettes between Adobe apps like InDesign, Illustrator and Photoshop.
The Kuler site does provide you a page with all your color palettes. But I use Evernote keep track of my Kuler palettes. With Evernote, I can set up a notebook with project information, other design inspiration and potential color palettes all in the same folder.
When I find a color palette I like, I email it to my Evernote account. Every Evernote account has an email address that you can add notes with. It's generated by Evernote and you can easily add it to your address book.
The email attaches a graphic of the color palette and a link to the site where I can get the ASE file. I wish the email would include a copy of picture that inspired the palette. But that's easy enough to add separately in Evernote if I want to keep a record of it.