Ranked in these QuestionsQuestion Ranking
Pro Point and click merging
AraxisMerge has a feature which is very helpful especially for beginners. By clicking on different parts of a text file you can select all the parts to added in a final merged file. The comparison display also updates real-time as the merge happens.
Pro Directory comparisons
AraxisMerge supports comparing different directories with each other.
Pro Beautiful interface
Pro Three way merges
AraxisMerge supports three way merges.
Pro Update alternative files Word, PDF and even images
Pro Works great on large files
AraxisMerge is not free:
$129 Standard and $269 Professional
But this is peanuts for a tool that you can use all day for the rest of your developer life.