For free photos/pictures:
http://www.mycutegraphics.com/
http://pixabay.com/
For surveys:
https://www.surveymonkey.com/
For showing your photos/presentations:
www.slideshare.net/
http://www.picturetrail.com/
For videos:
http://flixtime.com/
www.youtube.com
For videoconferences:
flashmeeting.e2bn.net/
For recording your voice:
audacity.sourceforge.net/
voicethread.com/
http://www.voki.com/
For arranging a meeting:
http://www.timeanddate.com/worldclock/meeting.html
UNICEF
http://www.unicef.es
http://www.unicef.pl
http://www.unicef.cz
http://www.unicef.sk