As I've said before, given the ready availability of online alternatives, libraries no longer need to concern themselves with providing or blocking patron access to office software (e.g., word processors, spreadsheets, etc.). Well, in light of rumors that Google is about to launch a web-based alternative to PowerPoint, The Distant Librarian recently pointed to Kolabora's list of existing online presentation options. And there are plenty.

[Kolabora] Web Presentation Tools And Technologies: A Mini-Guide (via The Distant Librarian)