Some top brands of low-sudsing detergent include: Ajax, Gain, Tide, All, Green Works, Country Save, Dreft, Planet and Seventh Generation. All of these carry high-efficiency, or HE, products. Low-sudsing detergents are common in many stores today, and are labeled with the HE logo on the container.
HE-specified detergents produce a lower amount of sudsing action than traditional laundry detergents. They are developed for high-efficiency, front-load washing machines and certain top-loading washers that produce more agitation during each cycle and use much less water than traditional top-load machines. When traditional detergents are used in one of these washing machines, too many suds are produced, increasing the chance that mold can grow within the washer, as there isn't enough water to completely rinse the detergent away. Too much detergent in any washer causes wear and tear on the machine over time.
Detergents that produce fewer suds are typically more concentrated than other detergents; therefore, one doesn't need to use as much HE detergent to get clothes clean. It is also fine to use HE laundry detergent in a non-HE washing machine. Using less detergent in a wash load than is recommended on the washer's directions likely has the same cleaning effect and saves money over time.