Yes, MagiDock is available for download at no cost.
Changes to the dock's settings require restarting the dock to see the new effects. This causes the screen to flash and redisplay all windows.
Yes! Just click the "Reset to Defaults" button at the bottom of the settings window.
An overview of each setting is available on our help page.
The app requires access to changing dock system settings, which is not allowed on the Mac App Store.