PhotoShop Vs. Pixelmator Vs. Aviary

Ok, I know that Everyone knows about Photoshop because it's (supposedly) the most powerful image editing software. It probably is, but I will propose some other alternatives.

The first Alternative is Pixelmator. It is a downloadable software with a 30 day free trial and it is very powerful (not as much as Photoshop, but close).

The Second is Aviary's Phoenix. It is an image editing program made in Flash (I think) and it is online. This is probably the best cross browser no download image editor. I think that all of Aviary is great. It's only in Beta now but when it comes out I will use it regularly. It still has some bugs but the developers have promised to improve on it.

Hope you guys can find this useful!!

P.S. I've heard that some websites are giving out free Pixelmator licences (search for it)