I made this wall-mounted organizer for small electronics, like resistors.
It consist of two pieces; the base/holder and a divider.
I made this project with 123D Design, a free download is available at http://www.123dapp.com/design.
It took me two hours or so to make and I guess it will take some hours to print depending on your settings. (I haven't tested it)
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To get the files click this link, it will send you to the thingiverse page I made
Step 1: The Base
To start, open a new project and create a box. The dimensions I used were: 100mm X 30mm X 5mm