Mounty is a very simple indicator applet you can use to mount CD / DVD images. It supports ISO, IMG, BIN, MDF and NRG and besides mounting, it can also burn the images to a CD/DVD.
Mounty can also remember the mounted images and add it to startup with a single click. It's a very simple but effective little indicator applet.
Install Mounty in Ubuntu
Mounty is available in the TahuTEK PPA. Add it and install Mounty in Ubuntu 10.04, 10.10 or 11.04 using the following commands:
sudo add-apt-repository ppa:tldm217/tahutek.net
sudo apt-get update
sudo apt-get install mounty
Once installed, you'll find it under Applications > Accessories > Disk Image Mounter (Mounty).
Thanks to Damar for the PPA; AppIndicator created by Kasimir @ skss.learnfree.eu for creating this applet.