You know I've actually kind of been expecting a response such as yours for a while. I've watched it happen and many other projects before, so I knew it was just a matter of time :p
I totally understand all the points you make, in fact they say in uni that you won't make it anywhere if you can't work collaboratively with others. But the other thing is I've just come out of my first group project on IT development and it was the most horrible experience I've had to date. Not only was my partner incredibly stubborn and believed he was right all the time, but his overall standard was way below what I was aiming for so I was doing a lot more work than what I had to just to get the project up to a level I was proud enough to submit as my work. Up until I spoke to my lecturers, who were super awesome and handled it magnificently, I was really dreading working on my assignment despite it being something I genuinely enjoyed doing because of the way this other fellow was. I'm not saying every group project is going to be like that, but the fact that you've brought it up right now is really really bad timing.
I've got several gigabytes of past projects (40+ projects, not just java) that I've started and not finished either due to getting bored or just not being able to go further with them. This project has been by far the one thing I've stuck to longer than anything else, and I can't see myself stopping, because I like hacking formats and it's something I can actually do, unlike making games or writing emulators which either bore me easily or just get too complex after a while. If I ever did suddenly decide to abandon it, then I would put up the source code, but I plan on sticking to my guns for a long while yet so :p
As for the Tile Molester thing, its obvious, people (who are smart) just aren't that into making little public apps like they did 10 years ago. Back then iirc it was sort of like a boom in the whole hacking front, but since then there's been lots of things going on, such as how companies are making a real effort to prevent illegal use of their stuff. And also alot of those "people" probably have jobs now, or lives, unlike me :p I'm not saying hacking in general is any less than it was, there just aren't any uber tools popping out anymore, because they do take a bit of time to create.
I still use Tile Molester myself to check my assumptions on things when I'm hacking files, because it does its job, just because its old doesn't mean it needs to be replaced...But hey a tile editor is easy to make so why don't you make one :p
My hex editor never made it past displaying the data onscreen, though I intend to change that...
I've still got an assignment to finish off today, and I need to put in some time to study over the next week for exams, but other than that I'm essentially on my break now so