I could still use some help on the engine, so if you've written a great effect that can be put into the engine, or if you found some bugs you can always email it to me. But I'm also looking for the following things:  

 Good BYTECOMPILER, or any information on how to do it.  
 A great sprite-editor....  
 Game-Networking information 
 UNZIP code compatible with PkZip