I am a big fan of the web design tool Squarespace and am currently turning a restaurant web site template into the marketing site for my presentation app. Hidden inside Squarespace is a cute free quick logo design tool that uses icons from the noun project. If you are a startup on a tight budget, it could be a good source for your first graphical identity before you are ready to pay serious designers.
SlideMagic: a platform for magical presentations. Free student plan available.