FileLight.com

ECMerge compares and merges files and folders, side-by-side or 3-way. It is designed for software engineers, web authors and other professionals who work with multiple revisions of text files or who need to keep multiple folder hierarchies in sync. Two text files or folders can be compared to a common ancestor: comparing entire source code branches can give assurance that every change introduced in a particular product release is known and understood. Save your work at intermediate situation and restart it later (full comparison status saved)! Define favourite comparisons as templates to launch them in one click or with the command line.