Magic Hour is just like Instagram in that you can add filter effects to your photos, except it’s for Android (iPhone version available too) and doesn’t come with another social media place for your files.
There are two versions, Free and $1.99. I suggest starting with Free, seeing if you like it and then buying the full version. Free limits the photos to 640×640 (full 1024×1024), doesn’t allow you to launch straight in to the camera, edit files already on the phone and only allows you to download 3 filters from the market. However you can still create your own filters, take photos and upload them to flickr, Facebook and Twitter.
It’s simple to use and on my Samsung Galaxy S II not too slow (although from the market reviews slower processors might struggle a bit).