Plascolin is a nice tool for Linux to create 3-D anaglyph (red-blue) images from two jpeg photographs. However, I couldn't find easy-to-use instructures (for me at least) on the net. Here is how I got it to work on Ubuntu:

• Install automake: sudo apt-get install automake

• Look in the /usr/share directory for a directory called automake. Relink all bad links to the appropriate file in /usr/share/automake-xxxx (see your dist) by executing ln -s /usr/share/automake-xxx/file file

• Install lib gtk+: sudo apt-get install libgtk2.0-dev

• Install libjpeg: sudo apt-get install libjpeg62-dev

• Run ./configure to configure the system

• Run make to make the program

• Run sudo make install to install it

• Run plascolin to run it

After you have taken a set of pictures, rename them from whatever filename the camera saves them as to xxx-l and xxx-r (for the left and right pictures, respectively). You can then use Plascolin to switch back and forth between sets of pictures.