The latest Cisco AnyConnect VPN clients are available to download here:
Windows clients (XP, Vista, 7, 8 and 10 (32 and 64-bit)):
Windows AnyConnect Client 3.1.13015
Windows AnyConnect Client Installation Instructions 3.1
Windows AnyConnect Client Configuration and Use 3.1
Linux clients:
Linux AnyConnect Client 3.1.13015 32 bit
Linux AnyConnect Client 3.1.13015 64 bit
Mac OS X 10.6 or higher clients:
Mac OS X i386 AnyConnect Client 3.1.13015
Cisco no longer provides a VPN client for Power PC MAC
NOTE: Cisco is phasing out their support for the Cisco IPSec VPN client. The Cisco IPSec VPN client is no longer supported at the APS.. For more information, see: Cisco Notice: End-of-Life Cisco IPsec VPN Client