PicFull is an cool web app that will make your photos look awesome before you share it with your friends.It has a very simple and a user-friendly interface.and it allows you to add multiple filters to your photos online instantly.
You might also like Psykopaint which converts your photos into awesome paintings.
To begin, click Choose Photo to add a photo from your system and add effects using filters. There is a vast range of effects that can be added to photos; filters like Vintage Dark, Line Coloring, Pen Outline and Color Separation are only some of them.
When you select a filter, it is instantly applied and you can also tweak it to give your own styling with color, saturation, contrast etc. Once done, click the save button. Now you can either save the photos on your desktop or share with your Facebook and Twitter friends.