Is there a resource out there some place that has custom UITabBarSystemItem icons that others can use. I know you get some from Apple to start, but I would imagine there are a l
You can get some free icons from Glyphish under the Creative Commons Attribution license.
Also, although it's not free there's a nice icon set available from eddit. These work fine for TabBar items.
You can try use following:
UITabBarItem *anItem = [[UITabBarItem alloc]initWithTabBarSystemItem:UITabBarSystemItemMore tag:0];
And the system icons are described and shown in: http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UITabBarItem_Class/Reference/Reference.html
Check out IconFinder. They have a very robust collection, and you can sort by image size. though these are not always perfect for the TabBar, you can find some good generic icons. You can also filter by license to find icons that are available for commercial use.
Here is a list of some great resources I found. I have no connection with any of these sites just some resources I think are useful.
Free:
Free and paid:
Paid: