mendeley (reference manager)

Hardy/8.04:
deb http://www.mendeley.com/repositories/xUbuntu_8.04 /
Intrepid/8.10:
deb http://www.mendeley.com/repositories/xUbuntu_8.10 /

apt-get update
apt-get install mendeleydesktop

Then in a terminal window as a user enter the following to run Mendeley Desktop:
mendeleydesktop