Hydro Electric Power Generation
This is really only an option if there is a local source of water with sufficient head or speed.
There are various ways of extracting power from local sources of flowing water, such as this Ibasei Cappa turbine but they are fairly expensive ($12,000) and this example generates a maximum of 250W.
Not an option for most people but, coastal homes could be powered by wave power. This is usually done on a scale where whole towns and villages benefit from it.