eg.
add sublime text to launcher so as to be found by launcher, docky, etc.
add a file
sudo gedit /usr/share/applications/sublime.desktop
set content as follows:
[Desktop Entry] Name=SublimeText Type=Application Exec=/opt/SublimeText2/sublime_text Terminal=false Icon=/opt/SublimeText2/Icon/48x48/sublime_text.png Comment=Sublime Text Editor NoDisplay=false Categories=Development;IDE Name[en]=sublime text
