1 million tweet map - Live twitter geo location map that geolocates the tweet for the last 6 hrs

Conweets - Shows peoples historic conversation on twitter and connectivity

Checkusername - Searches 160+ social networks at once

Echosec - Excellent geo tool for geofencing and locating uploads from Twitter, Fickr and Instragram

Geochirp  - Localised Tweets search

Geofeedia - Set a geo fence to monitor social networking in that area

Icerocket - Search engine for geo Tweets and Facebook posts

Intel Techniques - Custom Facebook tools

Lazqa - Search for an area and see the tweets in that area

Linkedin - Business professionals search engine - ALERT!- the profile sees youve searched them

Namechk - See where a username / tag exists and lists other lesser known social network sites

Netbookcamp - Serach facebook accounts

Shodan - Lists the location of a server holding a persons profile

Snitch - Social network name search

Social searcher - Social media search engine

Socialmention - Search engine which indexes social uploads

Teachingprivacy - Search a Twitter or Instagram username to see where their tweet or post was sent from.  It shows a 'heat map' where they do most of their tweeting.  Their location option on their device must be on.

Topsy.com - Social network analyser and archived tweets

Tweet tunnel - Several Twitter tools

Tweetarchivist - Serach for tweets that have been archived and no longer on the twitter pages

Tweetdeck - Twitter search

Username - Serch for a username

Usersearch - Deep web search for usernames and hash tags

UVRX - Social network keyword searcher

Wheretweeting - Outline an area on a map to see the Tweets in that area