Scheduling Social Media Content

Which tools do you use to send out social media content on a scheduled basis? I've considered using Buffer, and it looks like a great resource, but their pricing strategy will quickly become too expensive for me. While using Buffer to deliver content, you have to pay a separate fee for each social media site you use. I doubt I can swing that. Is there anything more affordable out there? I'd much rather pay a flat rate than to worry about variable costs.