This link has links to 10 free online photo editing tools to resize, blur or do whatever you want with your photos.
http://www.lifeclever.com/10-free-web-based-alternatives-to-photoshop
http://www.sumopaint.com/home
Photoscape - Needs download but 100 % free -
http://www.photoscape.org/ps/main/download.php
There are many more out there that are very easy to use so you don't have to spend alot for a photo editing program. Although I have never found a better substitute for Photoshop the above links are good for quick fixes and are all free.