Here's a great resource for a ton of free SaaS "Software As A Service" (cloud-based apps). Click here to view.
Constant Contact is getting ready to launch a new social media marketing tool within its suite of current offerings (email marketing, online surveys and event marketing). As a "Constant Contact All Star", ExtendedOffice is an early adopter and gets to check it out before "the world". They have launched a great social media educational blog that is really quite excellent. Check it out and get all of your social media questions answered in one place!
Struggling with Office 2010, or just want to know how to use it more productively? Check out these great quick reference guides by Excel, Office, Outlook, PowerPoint and Word.

These printable quick references are yours to use, distribute, and share at your organization! Really great stuff!
Here's a powerful online presentation sharing engine that not only allows you to upload your PowerPoint presentations online for free, but also assists you to share
them with your friends, students or co-workers located across the globe.

authorSTREAM is a great online community that gives you access to numerous
presentations on varied subjects uploaded by community members. You can find
exciting presentations on just about any topic, rate them, post a comment and
even embed them in your blog.