Compare And Merge 

Compare and Merge is a visual file compare utility. It lets you see the differences between text files, and makes it easy to resolve these differences. For programmers, web developers, and anyone else who works with multiple revisions of files.
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Web Log Mixer 

Merge and compress your ftp or web log files into a single file. Most log formats are supported as long as log files compressed with zip, gzip or bzip2. The program works as a GUI or command line utility, configuration files are in plain text format.
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123 Audio Video Merger 

Merge audio or video files into a single output file! 123 Audio Video Merger is a freeware utility that provides a fast and easy way to do this.
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