Sometime you may need to send in an assignment or coursework where you are very proud of the pictures and other multimedia, only to find the resulting pdf (which you use to stop others changing the content) is too big to email. What do you do?
PDFvia is the solution, though I am not exactly clear why this is limited to pdf's. However, it does say it will take 50 meg files, and is free. Then you can simply share the web address of where others (e.g. teachers and tutors) can find it.