Want analyze progress of Twitter retweets? Either your own or someone else. Try Twitter Retweets Analyzer on address http://retweetsanalyzer.appspot.com. Simply enter URL of tweet and you will obtain interactive progress chart and ordered list of users who retweeted it. (Limitation: There is limit for 100 retweets base on Twitter API rectrictions.)
Foursquare contains your personal history. With this project you can use Foursquare it as your Personal Diary. Try http://diary.look4square.com, you can find where you have been, what you did, whom you met, what photo you took etc.
Looking for Foursquare venues in any area? Try Look4square.com. Project was created in the begining of 2010, when was difficult to find venues on the map. Now there are several similar tools on the market. Project was created together with mobile version for platforms without native Foursquare client.
Macro for Google Docs Spreadsheets that display Twitter Follower, Followings, Location and many other data about Twitter Users. Just write =TwitterFollowers("stephenfry"). The easiest way how to start is this template document (make your own version by File - Create Copy).
Macro for Google Docs Spreadsheets that display Facebook likes and shares for given URL. Just write =FacebookLikes("http://techcrunch.com/") and you obtain number of likes, shares and comments for techcrunch.com webpage. The easiest way how to start is this template document (make your own version by File - Create Copy). The script is also available in official Script Gallery.
Macro for Google Docs spreadsheet that display number of Facebook fans for give Facebook page. Just write =FacebookFans(69578781928) and obtain number of fans for Facebook page (in this case GUG.cz). The easiest way how to start is this template document (make own version by File - Create Copy).