If you need to share your presentations online then SlideOnline.com can be very useful. SlideOnline.com is a free service where you can upload PowerPoint (.PPT) and PDF presentations to be shared online or embedded into blogs or websites. The first time you access SlideOnline you can create a free account and then start uploading your presentation files using a drag and drop feature. You can also import your presentations from services like Dropbox, Skydrive, etc.
SlideOnline is a free alternative to other similar services like SlideShare, AuthorStream, SlideBoom and many others, but after you start using it you will find it very user-centric and easy to use. As soon as you upload your presentations, you will get a link and instructions how to share the link slide deck with your colleagues to run the presentation online or embed into blogs like WordPress or Tumblr. The service is free and there is a conversion process behind the scene that will convert the PowerPoint presentations into a web version that can also be played in your mobile devices such as smartphones and tablets without compromising the quality.
You can browse presentations uploaded by other users or even find good PowerPoint templates that can be downloaded from the site. Also you can create a custom channel (like in Youtube) so you can publish your presentations there.
Learn more about how to share PowerPoint online at SlideOnline.com