Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
Ralpha Image Resizer - High-speed image batch conversion tool
Microsoft IIS - Internet Information Services is a web server for Microsoft Windows
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
LiteSpeed Web Server - LiteSpeed Web Server (LSWS) is a high-performance Apache drop-in replacement.
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.