Feltron: every year this guy asks a question and collects data from everyone he meets -- and collects the data that they volunteer -- publishing the Feltron Report each year. VERY INTERESTING
from the University of Missouri - "eThemes is your source for content-rich, kid-safe online resources that will help enhance your teaching and save you time. eThemes provides free, fast access to over 2,500 collections of websites, on topics ranging from Aerodynamics to Zebras and everything in between!
By researching and creating these resources for you, eThemes will save you the time that you used to spend wading through millions of hits on Google, trying to find a few websites that meet your teaching needs. We do the searching for you, giving you more time to improve your lesson plans and actual teach!"
Twitter Tools: Nest Unclutterer lets you set rules to protect yourself from marketers, remove followers who have been inactive for a given period of time, & allows you to review those accounts who meet a criteria before being removed