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"At Source, Jacob Harris notes that, as appealing as the Twitter API may be as a source of what-people-are-thinking data, it's hardly perfect. Twitter's demographics aren't representative of either Internet users as a whole or the broader population, and geocoding data is sparse and inconsistent. "

Foller.me is a Twitter service that can provide you with the most detailed information about a specific Twitter user in the least amount of time! Here's how it works. You input a Twitter name into the searchbox and hit enter. Foller.me gets access to the profile of that user via the Twitter API, scans all the public info and the latest 200 tweets! In general, you'd read those 200 messages to get to know what that specific user is all about, right? Well you don't have to! Foller.me has done that for you already, and provides you only with the most significant parts of those 200 tweets. It builds up three tag clouds: topics, #hashtags and @mentions, all based on the user's recent activity, AND excluding all stop words! Isn't that great?

"There are quite a few QR Code generators online. Some of them like Barcode Maker simply cosmeticize the Google Chart API while others like ZXing have full MECARD encoding. Here are the best examples:"

This neat tool from Google, ChartTool is a simple-to-use chart-making service that lets you simply paste in your data and play around with how it looks. It's never been easier to whip up charts that are actually easy to use and update. In fact, embedding these charts on web pages is quite simple thanks to the embed API. You can even make QR codes in just a few seconds and quickly get an embed code to add it to your website. While ChartTool does not create as many of those fancy 3-D charts that Excel does (it still makes quite a few), it likely will be able to in the future. However, if you're in a rush and need to whip up some exact charts without all the fluff, this is the tool for you.