The 1 Month Plan plan by StrongVPN does have a VPN Client.
It does not have bandwith restrictions, and they don't keep your connection log. They also do have a mobile client and a Kill Switch feature is available.
This plan also comes with the following benefit(s):
Customer Support: 24x7 Technical Support
Server Locations: 46 Cities in 24 Countries
Number of Connections: 5
VPN Protocol: PPTP, L2TP, SSTP, OpenVPN & IPSec