Gnome-paint is an easy use drawing tool designed for Ubuntu Gnome desktop environment.It is looks very like MS-paint in Windows system,so you may want to try this program in Ubuntu if you used to be a Windows user or you have a Windows dual boot system.

See the screenshot:

Gnome Paint can be download from its project page.Download appropriate deb package,double click on the deb to install or use sudo dpkg -i package.debcommand.