software Tech Demonstrator - GPS Logger App A tech demonstrator teaching note assessing the accuracy of the Android GPS Logger app DIPS A free software for Windows developed by Prof. Chinmaya S Rathore to teach introductory digital remote sensing and image analysis concepts PDF Shrinker An easy to use free and open source GUI app that runs on top of Ghostscript for compressing or reducing the size of PDF files. Available for Windows and Linux.