UltraCompare, developed by UltraEdit, is a file content comparison tool. It can perform comparisons in text mode, folder mode, and binary mode, and also allows you to merge and synchronize compared files, with support for undo operations. It features bookmarks and favorites functionality, and you can set filters, making it indeed an outstanding file comparison program. You can use it to compare the differences between two text files, compare the differences between two EXE files in binary mode, or use it to compare the differences in files within two folders and their subfolders.