Community Classifieds is a part of the Townline website. Townline offers information on every town in Massachusetts. No fee or sign up. The market is tight. You may need to contact a number of agencies before you find a place to live.
Web searches offer an easy way to search for agencies.
This search will come up with at least 42 agencies. BostonApartments gives a list of rental agents, apartment complexes, and management properties. This site lets you know which agencies provide free service. Use these to search for local laundromats, banks, shopping centers, restaurants, schools, and other conveniences . The City of Waltham, Massachusetts Home Page offers information on local neighborhoods, restaurants, history, calendar, and links to other Waltham sites.