Most social media monitoring and scheduling tools that do everything Sendible does cost thousands of dollars, but Sendible costs less than $100 a month and does everything I could want it to do... and more! I mostly use it for scheduling, but (among MANY other features) you can also use it as a custom service tool to assign social media posts to customer service reps. Love it. My favorite scheduling featuring is the "recurring post" feature that allows you to schedule a post to go out multiple times without having to schedule it multiple times. The tool also makes it really easy to create custom reports that get autogenerated and sent out however often you'd like.
It's occasionally buggy on Google Chrome, so sometimes I have to switch of to IE to get things done.
Unless your company makes in the hundreds-of-millions of dollars per year, there's no reason to spend $4-5k on a social media tool... get Sendible and use the extra money for social media ads instead!
As I mentioned already, it helps me schedule posts for all of my channels (including Pinterest and Instagram). It also has an RSS feed integration that allows you to pull posts from your site or other sites and have them auto-posted to your social channels. The biggest benefit of this tool is that it saves me so much time scheduling so I can focus on bigger projects that have greater ROI.