Revive Old Posts is a plugin which automates sharing on social networks based on posts age. The free version will give you a good idea of what it can do, but the PRO Add-on is the one who makes it the best of its kind.
With the PRO version you will be able to share posts with images, this feature alone will greatly increase the engagement and CTR of your posts. With the PRO Add-on you can manage multiple accounts on each network, as well as have different schedules and post format. Another great feature for webmasters is the Custom Schedule, which allows you to create sepparate schedules for each day or group of days.
Revive Old Posts PRO can share not only posts, but pages and custom post types as well.
On every website there are posts and/or pages which shouldn’t be shared (Contact Page, Terms of Serice, etc.) or are not suitable for some social networks, in this situation you can make us of the feature to exclude posts. This can be done either by selecting them individually using filters or by category.