Bryce Daz Studio and Hexagon were the 3 programs that were included in the Free Software Offer.
Carrara has always been a “for purchase” product and was not included in the free software giveaway.
There was at one stage a public beta for Carrara, with a serial number which timed out and had to be replaced at intervals.
However for some time now the beta version of Carrara 8.5 is only released to those people who have purchased a copy of Carrara
THere is a limited time trial version of Carrara available, which does also time out, as do most trial versions.