Estim Control/Server (ECS) is my replacement for the Commander app created by E-Stim Systems. It allows you to control a 2B power box from your computer, or to use the app to connect remotely to another person's app, and through that to their 2B. It is interoperable with Commander, though obviously the advanced features are only available when connecting to another copy of ECS.
In addition to the basic control over modes and output levels for the 2B, ECS adds these key extra features:
For remote play, ECS adds some additional features above Commander, which can make it easier to set up, and more flexible
Estim Control/Server should work on Windows 7 and above; it may also work on older versions, but I can't guarantee that. The Mac version should work on OS X 10.6.8 and above.The Linux version requires an x86 processor and GTK+.
Downloads are here. From version 2.4.1 there is a menu option to check for updates.
This page gives a little information about some tips and tricks you can do with ECS. For more details, please refer to the old pages, but note that there may be some minor changes since then.
For details of what's changed in the latest versions, please see here.