JMLayerStyles
OMG A SPECIAL NOTE! While I am using this in a couple places in my own projects, I wouldn't recommend just tossing it into yours just yet. I'm open-sourcing it now mainly to get some thoughts from everyone on where to take it. It's still very custom to my own needs.
JMLayerStyles is a set of tools built around a small little UIView subclass that supports being styled by invoking methods whose parameters are quite similar to those found on Photoshop's "Layer Styles" panel.
The end result looks like this:
JMStylableView *styledView = [[JMStylableView alloc] initWithFrame:CGRectMake(10.0, 30.0, self.window.bounds.size.width - 20.0, self.window.bounds.size.height - 40.0)];
[styledView addLayerStyle:[DropShadowLayerStyle dropShadowStyleWithColor:[UIColor colorWithWhite:0.0 alpha:0.56]
distance:4.0
size:4.5]];
[styledView addLayerStyle:[InnerShadowLayerStyle innerShadowStyleWithColor:[UIColor colorWithRed:71.0/255.0 green:159.0/255.0 blue:243.0/255.0 alpha:1.0]
opacity:1.0
distance:1.0
choke:0.0
size:0.0]];
[styledView addLayerStyle:[StrokeLayerStyle strokeStyleWithColor:[UIColor colorWithRed:3.0/255.0 green:25.0/255.0 blue:47.0/255.0 alpha:1.0]
opacity:1.0
size:1.0]];
NSArray *colors = [NSArray arrayWithObjects:[UIColor colorWithRed:19.0/255.0 green:148.0/255.0 blue:213.0/255.0 alpha:1.0], [UIColor colorWithRed:10.0/255.0 green:71.0/255.0 blue:131.0/255.0 alpha:1.0], nil];
[styledView addLayerStyle:[GradientOverlayLayerStyle gradientStyleWithColors:colors style:GradientOverlayStyleLinear]];
styledView.cornerRadius = 10.0;
[self.window addSubview:styledView];
[styledView release];