Social media management
Do you manage multiple social media accounts for your business and find it hard to keep up with them all? Hootsuite is a great service that lets you connect to multiple accounts (Facebook, Twitter, LinkedIn). You can post updates to multiple accounts at once, schedule updates for the future, automatically share blog posts across sites, and more. Plus you can use the service for free for up to five social profiles.
Update 4/8/14: I recently discovered Buffer, which is easier to use and gives you many more social media accounts you can post to. Try it out!