FollowLetter - Newsletters Socialized And Moved Out Of Your Inbox

FollowLetter lets you subscribe to your favorite newsletters and blogs with a single click. Moving your newsletters from your inbox to a web dashboard allows you to read, comment, save, and share publications while reducing email overload. Discover new newsletters based on your interests and connect with similar people. Co-founded by Ossama Benallouch and Hussein Ahmed.

Join FollowLetter on Twitter, Facebook, and AngelList.

Cloze - Surfacing Your Important Emails And Social Updates

Cloze (on the web, iOS, and Android) surfaces important emails and social updates you should act on by learning who is important to you. The daily "What's New Digest" email is a nice additional feature to quickly see important messages that need action without going to the site or app. Join them on Twitter, Facebook, and Google+.

Moodswiing - See How Your World Feels About Topics That Interest You

Moodswiing's iPhone app shows when, where, and why people are feeling the way they are. Share your emotions about recent news and events that interest you and follow other people to discover compelling opinions on my trending topics. Follow them on Twitter, Facebook, and Instagram.

Thread - See Who Is Calling Along With Their Recent Social Updates

Thread is an Android application that displays a caller's recent Facebook and Twitter updates as well as your recent emails and texts with them. Having this information displayed on the incoming call screen gives you great talking points with possible reasons for the call. Interact with them on Twitter and Facebook.

Contactive - Universal Caller ID With Unified Social Address Book

Contactive is an Android app from the team at Pixable that provides enhanced caller ID from your social networks and their global directory that has millions of unknown caller's information. Within the app it also combines information from your phone contacts and connections on Facebook, Google, Twitter, and LinkedIn. For more information watch the video demonstration by Jonathan Choi and check out their trademark application. Contactive has a blog and is on Twitter, although they are not posting yet.

Persona/ - Show What You Love From Your Networks In A Beautiful Way

Persona/ connects and displays your content from Intragram, Facebook, Twitter, Tumblr, Vimeo, 500px, and more. Every time you favorite a tweet, like a Facebook post or star a track on Spotify Persona/ will collect it. You can also follow other users. Follow them on Twitter and reserve your username today.

Chain.ly - Connecting People Who Need Help With People Who Can Help

Chain.ly's platform connects people who need help with those who can. Follow them on Twitter and Facebook.

NestPix - Making Home DIY Projects Social

NestPix for iPhone lets you create project folders, share photo collages to social media, share to our own community of users, search for projects all around you, and track and like favorites. Follow them on Twitter and Facebook.

Might - Discover The Things You Might Want To Do

Might is an iPhone application where people can discover and save all the things that they might want to do. It knows what you might want to do because it knows who your friends are. Might also connects to all your social networks and learns more about your interests. You keep on using your social networks and Might keeps on learning more about the things you might want to do in real life. Might is your personal almanac. One place for all the things you might want to do. Follow them on Twitter and Facebook.

Guchex - Follow Gurus And Subjects Of Interest

Guchexis is a free social platform intended for knowledge exchange between professionals, students, scientists, researchers, and geeks in general.

What About Me - Honest Anonymous Answers About You From Friends

WhatAbout.me is an online social network that lets you create a list of questions about yourself and get honest anonymous answers from your friends. Want to know what your friends really think about you? Follow them on Twitter.

Tattu - A Social Network For Tattoo Artists

Tattu is a private social network for real tattoo artists and their apprentices. A staff member reviews each registrant to ensure the community stays true to its namesake.

Expeerience - Photo And Video Stream Following Network

Expeerience - A Pinterest-style Twitter for experiences via photos and videos.

Acquaintable - Connect With Your Friends-of-Friends In A Nonconfrontational Way

Acquaintable works with Facebook to connect you with your friend's friends. Visit Acquaintable each day to see 10 possible contacts that you can get acquainted with if someone interest you. Only if they mutually want to get acquainted with you will your identity be revealed and the connection made.

Kulisha - Read And Interact With Your Twitter And Facebook Streams

Kulisha aggregates your Twitter and Facebook feeds into a Pinterest like board. An excellent feature allows you to pin/save any post for viewing later.

Meriad - A Short Video Based Sharing And Social Network

Meriad is like a microvlogging service. You are able to record messages, up to 30 seconds long, that are added to your profile and can be shared on other networks.

Archify - Archiving Your Social Content And Browsing Details

Archify is a browser extension and link to LinkedIn, Twitter, and Facebook that constantly is saving status updates and webpage visits. Every page in your personal index gets a thumbnail and description for later searching.

(Archify full review and invites.)

Miigle - Social Network For Ideas

Miigle is an innovative social collaboration platform that allows people and organizations to share, discover, and foster ideas that match their interests.

PinPuff - Tracking Your Pinterest Influence

PinPuff measures your overall Pinterest influence as well as the value of each individual pin. It calculates your Pinfluence, which is a measure of your popularity, influence, and reach on Pinterest. The score ranges from 0 - 100 with 32 being the average and over 70 making you a celebrity!

What is your PinPuff score? Let everyone know in the comments below along with your username.

Update June 26, 2012: Acquired by HelloSociety

(Check out some other social analytic tools here.)

SwapScan - Social And Location Based Market

SwapScan is a social location based marketplace changing the way you buy and sell. They blend social commerce with print marketing using QR codes and NFC technology. With a few clicks you can post an ad and:

• Post a smart classified ad to a local newspaper
• Print out smart fliers to help you find a new roommate
• Create interactive car stickers to sell your old car
• Create smart real estate for sale signs
• Instantly cross post on Craigslist and other classified ad websites