Hides the menubar shadow (Screenshot: http://d.asgeirsson.is/yWUi)

hidemenushadow.st

#!/usr/local/tranquil/bin/tranquil
import "AppKit"

\ Hides the menubar shadow
\ I used Platypus to wrap this script in an app bundle and then added that to my login items

nsapp = NSApplication sharedApplication

@OverlayView < NSView {
    accessor: #background

    - drawRect: dirtyRect {
        bounds = self bounds
        screenBounds = self window screen frame
        screenBounds[0] = [0, -screenBounds[1][1] + bounds[1][1]]

        @background drawInRect: screenBounds fromRect: NSZeroRect operation: NSCompositeSourceOver fraction: 1
    }
}

windows = nil
update = {
    windows = {}
    NSScreen screens each: { screen |
        imageURL = NSWorkspace sharedWorkspace desktopImageURLForScreen:screen
        view = OverlayView new
                 setBackground: (NSImage alloc initByReferencingURL: imageURL);
                          self

        frame = screen frame
        windows[screen] = (NSWindow alloc initWithContentRect: [[frame[0][0], frame[0][1] + frame[1][1] - 35], [frame[1][0], 35]]
                                                    styleMask: NSBorderlessWindowMask
                                                      backing: NSBackingStoreBuffered
                                                        defer: no)
                                               setContentView: view;
                                                     setLevel: -1;
                                        setCollectionBehavior: NSWindowCollectionBehaviorCanJoinAllSpaces;
                                                   orderFront: nil;
                                                         self
    }
}

NSNotificationCenter defaultCenter addObserver: update selector: #call
                                          name: NSApplicationDidChangeScreenParametersNotification
                                        object: nil

update()
nsapp run