Transparent beats

Play a song that’s akin to the one described above. Now, ensure that the main window has the focus (its title bar should be brighter than that of other windows) and type ‘NULLSOFT’. However, since pressing [L] opens the File Open dialog, you’ll have to press [Esc] after each [L]. Hence, you end up typing [N] [U] [L] [Esc] [L] [Esc] [S] [O] [F] [T]. This done, you see that the main window goes transparent at each beat and then reverts to being opaque. This Easter egg consumes a lot of system resources. If your system runs slow, type NULLSOFT again to turn it off, or just exit Winamp and restart it.

Falling Book in WinRAR

Works on: WinRAR 3.20,3.30

WinRAR—the popular file compression utility—has a smart Easter Egg. Start WinRAR and go to Help > About. Next, click the book icon and it starts to fall. Further, if you press and hold [Shift], and click the logo, you see a small sail boat near the letter ‘R’. You may have to click a few times to see it , though.