Detected in my computer by Ad-Aware, although I've never visited the site. Block them in your browser!
If you don't want to pay for Photoshop, try GIMP - a free open-source image editing program. It's definitely safe - I've been using it for years.
Site itself is safe, but you should always be careful when clicking the shortened URLs. They can lead to the malware site but you don't know it because you don't see the real URL.
It's safe and it has a good purpose, but there the community rates the sites so some ratings may be inaccurate and subjective.
Here you can convert PNG images to ICO icons and vice versa. It's safe, but converted icons are publicly visible.