A Free Learning Tool for Every Learning Problem?

Referring Tools: 
Wide sample tools from the Web 2.0
Description: 
Based in the structure of "I want a free..." it continues with a wide selection of one (or two) free tools for specific teaching needs. For example: Easy-to-use and secure Internet browser? Firefox or Chrome e-Mail system? Gmail RSS reader? Google Reader Social bookmarking tool? del.icio.us ... Tool using my real voice to discuss my interests and passions with anyone? Voxopop Tool to record and host my audio recordings online? Odeo Studio Tool to convert text to speech? vozMe or iSpeech Tool using my real voice to discuss my interests and passions with anyone? Voxopop ... and so until more than 200.
Developer: 
Zaid Ali Alsagoff. Centre for Medical Education, IMU (International Medical University)
Target group: 
Teachers. Language = English.
Positive elements: 
Every reader will find the best answer to his/her need. Very clear and simple.
Limitations: 
Not educational applications sample.