File Merge Express is a file comparison & file merge utility for Windows 2000/XP, Windows 2003, Vista, & Windows 7. 32-bit and x64 versions are available.
The program displays a contents comparison of two files and can (optionally) create a third file consisting of the merge of the two files being compared. That third file can (optionally) be opened in the built-in text (or binary) editor. If the two files being compared are like-named (they would exist in different paths of course), the program suggests a same-named merge file, to be saved in the last path used for a merge file. The program can also launch an external text &/or hex editor by double clicking on a line in the Comparison Results dialog.