Shrew Soft VPN Client is a simple and very well written VPN client, if you are using IPSec and CISCO, then this is just a masthave for you. There is nothing better where the Cisco VPN Client does not work this client is just fine. I tried it myself and it caught on. There are no Backup servers in the free version, to be able to sort them out in case of problems with the main one. But he's got reconnect when connection is break and generally in my opinion, it works better. And at the moment it is the only client that I know under Windows 10, which basically works.
You can read the "latest" news on the Shrew Soft VPN Client website. Why so, Yes because the latest news published as much as in 2013. Actually it does not interfere with me while the program is available. Stability allows me to put it in the list of programs that will always live in the archive in the folder long-playing :). Almost sure in future versions of Windows it will also work properly. There are not many such programs on my list. You can download the latest version from this page.