You will find many slide creation and sharing tools online. Here are a few popular slidesharing resources:
Want to see what others are doing? You can browse professional presentations online with LinkedIn's SlideShare, a hosting service for professional content including presentations, infographics, documents, and videos. Users can upload files privately or publicly in PowerPoint, Word, PDF, or OpenDocument format.
PowerPoint presentations don't need to be boring or simplistic. PowerPoint offers a surprisingly robust set of tools for academic work.
Check out these short tutorial videos from Microsoft. Subjects covered include everything from getting started to more advanced formatting.