These links are to applications that you may find useful.
Most will be windows based applications and are free to download and use.  Several of them require MS VB6 or MS .net runtime libraries, you probably already have those on your pc as they are included as part of recent windows operating systems.
As with all internet links, even though we've checked them and found them safe, please virus scan files before running them.

GameRoomTech Files This is an editor for asteroids rom.  It will allow you to edit the vector characters and text.   It is for advanced users. A program to allow you to run a simple 'bracket' style tournament.  Enter players, it'll randomize and advance winners through rounds.

Other WWW files