"The default pdf reader, Evince, should be fine for almost
everything. It is also much faster than its closed source
competitor.
"However, Adobe Reader is also available:
sudo aptitude install acroread acroread-plugins
" And for those who like to read pdfs directly in their
browsers:
sudo aptitude install mozilla-acroread
"2. Install Google Earth
"Ubuntu 9.04 "Jaunty" comes with the recent version 5.0 As many
Google applications, it is still labeled as a beta, but seems to
run really flawlassly."