Web applications are really booming in and presently there is no need to install any image editing software to do basic image editing. There are lots of free image editing web applications which can do all the basic image editing. Here is one more to the list- RoundMyCorners. As the name suggest its different in the way that it can make round corners for any image without having to know any image editing capabilities.
Round my corners is a simple online image editing tool which can round the corners of any image with the radius specified. The application is simple to use, all you need is to select the image to be rounded.
Next select the how much round you want the images to be. The selected is a slider and it gives the pixels also. Then select the type of image, back ground color and there is also option to add reflection to the image.
Once everything is selected, click on Round My Corners button. The converted image is available for download as soon as its complete. Overall the application is very basic and does only rounding of images, but the author promises of improvements in the future.