Not open source = not at all like WireShark, sorry.
And that's a damn shame. I could see a community growing around this kind of thing and adding all kinds of protocol support to it, if only it was open source.
No competition with WireShark is intended. WireEdit is a packet editor, not an analyzer. Can as easily edit a .txt Hex dump of a packet (not yet supported, but easy to do).
I will admit that I initially thought this was a Wireshark plugin or related to Wireshark in some fashion, based on the name and the appearance of the GUI on the page.
You may want to put a little disclaimer at the top saying it's not associated or competing with Wireshark.
http://netdude.sourceforge.net/
older package, but does basically this.