VPN Mobile 3.1
the author of this app says:
TheGreenBow VPN Mobile is a standard-based IPSec VPN Mobile Client, compliant with most of the popular VPN gateways allowing workers to access corporate network on PocketPC or SmartPhone. Highly efficient and extremely easy to configure, it provides remote workers or sales force a VPN Mobile software to securely connect to corporate network over GPRS-Edge-3G or WiFi. Full IPSec and IKE with Certificates support.