We use PromoRepublic a lot to create, post and schedule content on social media. They even have PREMADE posts ready to go, so you can stay hip and current, without having to do too much work! Just select your posts, edit if you want to, then post (or schedule a time to post down the road). Check out the video below for a quick overview.
Prices start at as little as $9 bucks a month. Includes all graphics and scheduling tools!