Hootsuite is a great social media tool. It allows you to manage several social media profiles with one login. The best feature is being able to schedule social media posts in advance. For example, schedule posts about events or sales for the appropriate time, instead of having to be online at the exact right moment to post to Facebook or Twitter. The free plan allows you to manage up to five social media profiles, but you can upgrade to the pro plan for a low monthly fee to add additional social profiles. I have been using it for over two years.