alock (fork)

Alock is a simple screen lock application, which locks the X server until the correct password is provided. If the authentication was successful, the X server is unlocked and the user can continue to work. When 'alock' is started it just waits for the first keypress. This first keypress is to indicate that the user now wants to type in the password. Such a behavior might seem to be annoying at the first glance, however this approach is chosen due to security reasons.

Note, that this application does not provide any fancy animations like xlock or xscreensaver and probably never will. It is just for locking current X session (with few flavors - see usage section below). If this application is too much for you, you may give a try i3lock.