[svalli]

I'm avoiding any kind of equipment, which uses the mains frequency as a clock signal. Usually, if the clock has a battery backup, it has a separate oscillator (except our alarm clock, which goes too fast during power outage).
Home Depot and other stores carry all sorts of nice dimmers, timers and remote control systems for reasonable prices, but we are not planning to buy anything, which uses the electrical wiring as control wires like in X10. Such things we have to get locally.

I have worked with AC drives (frequency converters for 3-phase motors) almost 20 years, so converting 50 Hz to 60 Hz could be done, but it is not needed for most household equipment.