LTSpice (http://www.linear.com/designtools/software/) will easily do all that and more besides. You can build up the circuit, define your voltage sources and then measure power in all the components, and power being used by the voltage source. What you're after though is very basic with regards to analysis, so basically any Spice software will handle this. LTSpice is free, as is Tina, and many others. Certainly LTSpice has a great community around it, which sounds like it'll be useful (have a look at the LTSpice users group)
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