jEmplode originally was just a cross-platform version of Emplode written in Java (for people on non-Windows platforms). Since then, though, it has acquired a bunch of miscellaneous features that Emplode doesn't currently support. It's basically just a competitor to Emplode at this point. It's been so long since I used Emplode, I don't recall what it doesn't do that jEmplode does (or vice versa), but I'm sure there are some people who know of some things offhand ...

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