Official Links:
RenegadeWare The company who made Ta-Ta Mahatta.
Other Links:
Megalith Music Home site of David R. Clark, the music guy.
Milkshape 3D The 3D modeling software used for making the 3D models in Ta-Ta Mahatta.
QUARK Quake 3 level editor used for making levels in Ta-Ta Mahatta.
Other Games Links:
Freeware Files

A good collection of freeware programs. Ta-Ta Mahatta can be found in this website.

Vektor Space 3D deathmatch arcade game.
VolFTP Italy Software site with loads of freeware/shareware programs. German website that provides many freeware/shareware/demos that suite your needs.