Want to stop using environment harming chemicals to wash your clothes but don't know what else to use? What you want is balls! Eco Balls. They do some groovy things to the Oxygen in the water which means your clothes get clean and soft without detergent or conditioner. They work out to be really cheap per wash as well.
In reality they're not perfect. They're great for colours that are moderately dirty, but for whites or really muddy clothes and the like you'll still need to reach for the chemicals. However, they can still make a decent impact and save you from using lots of detergent.
Ecozone Ecoballs 1000 Wash Balls
The original. We've used these for years and they do a decent job.
EVO3A ENVIRO WASH /WASHING LAUNDRY BALLS 500
We started using these recently. They're cheaper than the Ecoballs and yet seem to do as good a job.