Image Tools

SVG Converter
www.online-convert.com/

Video tools 
https://giphy.com/
http://freegifmaker.me/
https://gifs.com/


Sounds and Music
https://soundation.com/
https://www.buttonbass.com/

Copyright friendly images

https://openclipart.org/
http://www.wpclipart.com/index.html  
http://edupic.net/ 
http://commons.wikimedia.org/wiki/Main_Page 
http://pdphoto.org/
http://www.usa.gov/Topics/Graphics.shtml
http://publicphoto.org/ 
http://www.pdclipart.org/
http://freeimagescollection.com/  
http://www.public-domain-photos.com/ 
http://copyrightfriendly.wikispaces.com/
https://pixabay.com/en/photos/?safesearch=on&cat=nature