WriteRack: The best way to tweetstorm.
Spruce: Make Twitter ready images in seconds.
Click To Tweet: Get more shares on your content.
MyTweetLinks: Increases Twitter traffic.
Latergram: Easily plan & schedule your Instagram posts.
WordPress Pin it Button for Images: Add a “Pin It” button.
SharedCount: Track URL shares, likes, tweets, and more.
How Many Shares Count how many shares a URL has across most social networks, all in one place.
Justunfollow: Follow / unfollow people on Twitter & Instagram.
SocialRank: Identify, organize, and manage your followers on Twitter.
Klout: Social media influence score on browser extension.
Ritetag: Instant hashtag analysis.
Social Analytics: Interactions for a URL on most social platforms.
Buffer Free Plan: Schedule posts to Twitter, Facebook, LinkedIn, Google+.
Bitly: Create, share, and track shortened links.
Filament: A free beautiful and customizable sharing bar.
Addthis: Get more shares, follows and conversions.
Sumome Share: Auto-optimizes your share buttons for max traffic.
Digg Digg: Your all in one share buttons plugin.
Disqus: Build a community of active readers & commenters.
App Review Monitor: App reviews delivered to Slack and your inbox.
Presskit Generator: Generate a Press Kit for your iOS App for free.
Free Survey Creator: Create a survey. Get user feedback for free.