1) google services
search engine google.com
drive - storing files https://www.google.com/drive
docs (word, excel, powerpoint) https://docs.google.com
calendar https://www.google.com/calendar/
picasa - images galleries http://picasa.google.com/
webmaster tools - information about your page https://www.google.com/webmasters
2) https://www.virustotal.com/ - check if uploaded file has a virus
3) http://jsfiddle.net/ - create and test online pages with css and js
4) http://ideone.com/ - online compiler (java, c, c#, ruby etc)
5) doodle.com - create online questionnaires with custom choices
6) http://apps.pixlr.com/editor/ - image editor almost like photoshop
7) http://10minutemail.com - create mail for 10 minutes for example to click on registration links
8) https://office.live.com/ - free Microsoft Office (word, excel, power point)
9) https://ninite.com/ - install many programs at once. Useful after format
10) http://www.freefileconvert.com/ - file converter (video, image, documents) e.g. mkv to avi
