Gummi is a lightweight LaTeX editor written in Python/GTK
You can use following commands to download and install this editor in Ubuntu:
wget http://dev.midnightcoding.org/redmine/attachments/download/24/gummi_0.4.8-0ubuntu1_all.deb sudo dpkg -i gummi_0.4.8-0ubuntu1_all.deb
or you can download the latest version from its download page.
Now,launch this from Applications->Office->Gummi