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display a smiling smiley if the command succeeded and a sad smiley if the command failed
you could save the code between if and fi to a shell script named smiley.sh with the first argument as and then do a smiley.sh to see if the command succeeded. a bit needless but who cares ;)

Fast command-line directory browsing
Not really alternative, just giving a different behavior listing current directory if no directory given.

Rapidly invoke an editor to write a long, complex, or tricky command
Allows you to edit your command using your chosen editor. Works in bash with "set -o vi".

lotto generator

Don't save commands in bash history (only for current session)
Unsetting HISTFILE avoid getting current session history list saved.

Selecting a random file/folder of a folder
Also looks in subfolders

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Go get those photos from a Picasa album

Install pip with Proxy
Installs pip packages defining a proxy

List all users and groups


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