Mobile Design Elements
Little Springs Design (soon, revised and switching to 4ourth Mobile style)
A bunch of mobile components (and some other info, like typography) for general mobile design, as well as gestures, and even iPhone specific stuff for the fanbois.
If you are still on Freehand (and we salute you) the old, not-at-all-updated version
Yahoo!
Yahoo! Stencil Kit many non-mobile parts, but also useful general and iPhone bits and pieces.
Nokia
Nokia Mobile Design Patterns Not really the same thing, as they are just articles, not actual things to use for drawning. If someone thinks it needs to go somewhere else, move it.
S60 Wireframing Stencils S60 (through 5th edition) elements of all sorts.
Graffletopia
Teehan-Lax
Library of iPhone UI Elements Photoshop library of iPhone-specific elements only, now the link to the all-new v4 library.
Smashing Magazine
*Library of Android UI Elements Photoshop library of Android (default) elements only.
Developer.Android
*http://developer.android.com/guide/practices/ui_guidelines/icon_design.html Icon Design Guidelines, Android 2.0 Includes ways to download their template pack and other useful stuff. Quite detailed for the graphic designer, for a change.
Documentation Templates
Lots of documentation styles will work. Use your favorite one, or...
Little Springs has a mobile-specific documentation style, but it is still project (client) specific as yet. When we get a chance we'll sanitize it, write it up and share it here.
Drawing Tool Tips & Tricks
Just a list that we keep for ourselves, so we don't forget things. Feel free to add items, or even categories, if there's a tool you want to share your notes about.