WordPress TinyMCE custom upload
The reason you want it
It contains 2 type of upload : Can upload to your own local host, or upload to imgur.com
Beside support your wordpress comment form, it’s also support 2 favorite forum plug-in : BBpress and DW Question & Answer
The best thing is that it saving you lost of time when you need to upload some image,file to some 3rd party then get the link, paste it back to comment. Now all you need to do is click the button, choose file to upload. done !