Buzzoole

Buzzoole is an influencer marketing platform where users can analyze their social media profiles (Facebook, Twitter, and Instagram) and discover their best topics of influence.
Buzzoole connects brands wanting to launch influencer marketing campaigns with a potential influencer in exchange for Buzzoole credits that can be converted into Amazon Gift Certificates.
Tha app allows potential influencers to manage their participation in campaigns as well as the referral program. This includes brief consultation and possibilities of acceptance, keeping track of a campaign’s social activities, checking credits earned from campaigns, and managing credit conversion applications.
AlphaPost

AlphaPost is a social media automation tool, focusing on Twitter. You can use it to schedule and post tweets whenever you want..
You can queue your tweets, creating them whenever you feel like it, but delaying their sending until a more appropriate time. You can select what you believe is the optimal time to send each tweet.
If you are a large-scale tweeter (an influencer perhaps) you can create a CSV spreadsheet of your posts and import it into AlphaPost, ready for the posts to be sent out at the appropriate times.
Unlike some of the bigger name scheduling apps, AlphaPost is both free to use and ad-free.
Followers Insight for Instagram

Followers Insight allows you to keep better control of and increases your understanding of your Instagram followers. You can use it to manage and track multiple accounts.
It provides you with insights into your following, such as who is blocking you, and who your most loyal followers are. You can easily see the followers you have gained and those you have lost. It provides you with a means of unblocking those followers who have unfollowed you.
It also helps detect potential spammers, as well as who have most liked your posts.