Buffer is the social media management tool I use. You set up your social media accounts. These are the usual suspects: Twitter, Facebook, Google+, LinkedIn, Pinterest. You also set up your RSS feeds coming in. The latest posts on your feeds are displayed and you get to que them up for the social media platforms. You can set schedules of when these entries get posted, they'll even suggest optimal times.
The pricing for their plans are: free, $10, $99, $199 and $399 per month. Yes, I'm on the $10 plan and it's plenty for an individual.