Icon Creator API is a free web api for creating flat icon with custom dimensions, padding, background shape, background color, and color. You can use this API for over 2500 icon.
Image Resizer API is a free web api for resizing image to a specified width or height on your site to save you the bother of manually resizing images and saves your users the pain of waiting for large images to load.
Image Watermarker API is a free web api for watermarking image with your own picture or text in everywhere of images with your custom size, opacity, font style, margin, and etc.
QR Code Generator API is a free web api generating QR Code for every data such as url and use that into html or every where you want.