DOWNLOAD TOP FREE ENGINES

Firebird
   Contains
        Firebird 1.0 beta
        Firebird 1.0
        Firebird 1.01
        Firebird 1.31

Ippolit
   Contains:
       Ippolit 0.80
       Ippolit source code

Ivanhoe
   Contains:
       Ivanhoe v.73
       Ivanhoe v.81
       Ivanhoe source code

Robbolito
   Contains:
       Robbolito 0085d4
       Robbolito 0085d9
       Robbolito 0085e2
       Robbolito 0085e4
       Robbolito 0085g3
       Robbolito source codes


Houdini
   Contains:
      Houdini 1.03a
      Houdini 1.5a
      Houdini source code
     (Note: Houdini 2 is a commercial program)

If you don't have 7Z program, download it here:
Download link: Free 7z compression utility