Open Source PHP Image Library: Asido

Distributed under the LGPL license, Asido is a free and open source PHP image library, with “pluggable” drivers(adapters) for virtually any environment: GD2, Magick Wand, Image Magick via shell, Image Magick via extension, etc. It can be used for many image transformation operations: proportional resizing, watermarking, converting, rotation, cropping and more.