Helix, one of the most popular free boot disks for forensics is no more, or to be more accurate it is no longer free. eFense the makers of Helix are now charging a nominal sum, namely the subscription to their forums of $14 a month, for the minimum of one month, for access to the latest Helix ISO
The quality of the Helix tool has not diminished in any way, on the contrary it will/should now become an even more professional looking tool. However the time of Helix being free is over.
The Linux community has responded in the usual fashion and is producing its own free version of Helix – Helix CE – Helix Community Edition. This is due for release in April and they are currently looking for beta testers