Looking for social media management tool

Hi, everyone! Please suggest a social media management tool which is an alternative of Hootsuite and Sprout. These are very expensive for me, and I can say they are out of my budget at the moment.

I'm looking for free or really cheap similar alternatives of these tools. I have 7 FB accounts and I joined 20 groups with each. Moreover, I work with Twitter, LinkedIn, Instagram, Pinterest and Snapchat. I need it for content scheduling, social analytics and monitoring.

Any suggestions are welcome. Thanks in advance.