LaTeX Presentations
Now you can design presentation templates in Inkscape and use them as a LaTeX style. From the LaTeX Presentation Designer website:
The package contains a documentclass called “presentation” which takes as an argument a slide style. The package also provides a simple python program that can interpret SVG files generated by Inkscape and build a slide style, usable by the “presentation” document class, directly from it. This means that creating new custom slide designs is as simple as drawing what you want your slides to look like in Inkscape.
LaTeX based presentation are handy when you want nice looking equations on your slides. Other good alternatives are Beamer and Prosper.