Ethereal

Here's a blatant ripoff of the Ethereal home page:
Ethereal is used by network professionals around the world for troubleshooting, analysis, software and protocol development, and education. It has all of the standard features you would expect in a protocol analyzer, and several features not seen in any other product. Its open source license allows talented experts in the networking community to add enhancements. It runs on all popular computing platforms, including Unix, Linux, and Windows.

Wow, my name's number 34 on the list of 394 authors. I'll pretend that it's because of substantial contributions, and not because the list is in order of contribution ;)

I had contributed some patches a few years back, then didn't do anything for a while. Recently I contributed the code to de-chunkify chunked HTTP responses, and decompress compressed content.

I hope to get desgmenting for Connection: close HTTP responses next, as soon as I find some time.