I had a bit of a play around on www.befunky.com and edited a picture I had on my computer. I found that it was really simple to use and it had lots of cool effects you could add to your picture. 

PMI:

P:

• Fun
• Easy to use
• Interesting
• You can resize and image to make it easier to upload

M:

• Might need to update computer to be able to use program
• Could spend to much time editing images instead of doing other work

I:

• You can enhance the quality of the image greatly
• There are loads of editing options to use