A free program for Android, by GetProf.

Resize photo is an app that is able to resize images, photos, and other files to one of several predefined sizes. It can be used to resize images and photos from the gallery, the device, and more. The list of supported sources includes the device’s memory, as well as external storage devices like memory cards, and even the Internet.

The application allows the user to resize an image using three methods: using a scale, cropping it, or scaling it by using a ratio. The image can be resized to any size, and it supports several formats like JPG, PNG, GIF, TIFF, BMP, and more. It also supports the use of a variety of resolutions like HD, Medium, Low, and more.