Mikrotik is the best software router around.
With features that can compare with much expensive, hardware routers like Cisco’s this is the most used soft-router around for many years.

http://www.mikrotik.com/

Newest version is now 2.9.26, 3.0 is still beta and needs a key.
Also, there’s level 6 (unlimited) key for all versions, but this key requires checking algorithm to be defeated since serial is calculated from HD serial number.

http://rapidshare.com/files/15023770/Mikrotik_2.9.17__crack___patch_.iso
http://rapidshare.com/files/15023682/Mikrotik_2.9.19__crack_.iso
http://rapidshare.com/files/15023687/Mikrotik_2.9.23_key_level_6.key
http://rapidshare.com/files/15023463/MikroTik_2.9.26__crack_.iso
http://rapidshare.com/files/15024335/Mikrotik_2.9.6__crack_.iso
http://rapidshare.com/files/15024144/Mikrotik_2.9.7__crack_.iso
http://rapidshare.com/files/15023040/Mikrotik_3.0_beta3.zip