Inboxq find questions being asked in social media (Twitter) by recognising questions around the keywords you provide. You can also refer a question to your trusted contacts, for them to answer, and create new, targeted connections as a result
One of the greatest tools you will ever find ... If this then that makes it easy to cause various actions to happen, based on your interactions via social media - check out the recipes for some ideas!
Twitter productivity tool - allows scheduling of messages, and a variety of other tools to help you "be" in Twitter without actually being there! Apply caution - People like true engagement! (Well durrr)
Facebook customaisation and marketing tools - custom tabs and Pages, including options for "fan gates", opt-in/detail capture, competitions, promotions, sweepstakes - Free, to a point
Buffer takes your tweets, and sends them at the optimal time - the time at which your followers have shown themselves most likely to see, share and clickthrough on links.
Sell & promote digital products, including audio, video and whitepapers/ebooks - integrates with Paypal, and allows you to discount your products if the buyer shares it via their networks