Separator tab bookmarklet

Create a new bookmark, edit it, and paste this in the target address. javascript:{document.title=prompt("Name","SEP");};void(0);

Custom launcher in Unity

Create a file named application_whatever.desktop with:

[Desktop Entry]
Name=Application Name
Comment=Application Comment
Exec=/path/to/exec/command
Path=/path/
Icon=/path/to/icon
Terminal=false
Type=Application
StartupNotify=true

and put it in $HOME/.local/share/applications/