International Academy of Ecology and Environmental Sciences Network Pharmacology 2415-1084 9 3-4 2024 12 1 Two image viewers: A projector and a screen saver 11-23 EN WenJun Zhang http://www.iaees.org/publications/journals/np/articles/2024-9(3-4)/a-projector-and-a-screen-saver.pdf> Computer software will help biological researchers view and handle bio-graphics and images. Two standalone executable image viewers, Projector 1.0.exe and scrSaver 1.0.scr, which can be used to play JPG, BMP or ICO image files automatically and continually in Windows operating systems, were developed in present study. Projector 1.0 is an image projector and scrSaver 1.0 is a screen saver. In the Projector 1.0, users can set the time duration for displaying every image, choose random or sequential displaying and choose to stretch images or remain their original sizes on screen. After downloading and decompressing the package, copy and put them in any local folder containing multiple images. Double-click to run them. For scrSaver 1.0, the screen will enter the screen saver pattern, and randomly play the images in the folder. For the two software, they will exit the playing when there is a mouse or keyboard action. Both software and demo image files were given in a free package.