- Alternative Resource Funding - helps improve cash flow by purchasing accounts receivable invoices
- Antek Marketing: Custom Electrical Components and more - manufacturers' representative for electrical controls and fiber optic devices.
- Century 21 Affiliated - Blowers - serving the south central Wisconsin area
- COMO Industrial Equipment - manufacturers of Filters, filtration systems, coalescers, skimmers, reclamation, and recycling equipment for industrial oil and water based fluids. (Hydraulic, Coolants, Quench, etc.
- Computer Center - network installation and service
- Consigny, Andrews, Hemming & Grant, S.C. - includes areas of practice, philosophy, and attorney biographies.
- Don Chapin Insurance Inc. - offers a variety of personal and business insurance products.
- Earthsong Books and Gifts - Spiritual Center - offers books, workshops, and classes covering yoga, reiki, meditation, and aromatherapy. Also hosts a personal consulting center staffed by spiritual practitioners
- Forward Janesville Inc. - business organization that provides health benefits, seminars, counseling, and networking opportunities. Site includes information about the city.
- Goex Corporation - manufactures engineered rigid plastic sheet and roll-stock
- Gray, Cheryl - Century 21 - Janesville Realtor
- Gray's Brewing Company - offering ales, stouts and soft drinks
- InWave Internet, Inc. - Internet Service Provider, Web Designers
- Janesville Country Club - features an 18-hole golf course, wedding banquet rooms, as well as dinner and carry out items.
- Janesville Home Front - Real Estate
- Janesville Mall
- MacFarlane Pheasant Farm - pheasant, game birds and gourmet game meat delicacies
- Mueller Rentals - rentals, sales, and service for tractors and equipment from John Deere and other lines. Also offers an online toy farm equipment catalog.
- Natural Earth Essentials - Soaps and more
- Nowlan & Mouat - contains practice areas, attorney biographies and links to popular law-related sites
- O'Leary Dental - Dentist
- Ovation Business Resources - Management of Business Materials for Customer Use
- Package Pro Express Delivery - offers same day and next day service for pick up and delivery
- Parker Community Credit Union -offers financial services to residents of Rock County
- Precision Drawn Metals, Inc. - manufacturer of deep-drawn metal stampings
- QCC Kayaks - builder of sea kayaks, gear, and accessories
- Rath Manufacturing Company, Inc. - Manufacturer of welded full finish stainless steel and specialty alloy tubes and pipes
- Real Cheese Place, The - offers a variety of gourmet cheeses in decorative gift baskets.
- Rock County Economic Development Agency - offers direct support and/or referrals for buildings and site searches, planning, financing, operations and regulations.
- Shamrock Aircraft Sales - specializing in new or late model single engine Cessnas
- SSI Technologies, Inc. - manufactures speed, pressure, ultrasonic distance, tank level, and fuel level sensors and powdered-metal components for automotive and industrial applications
- Star Auto Parts, Inc. - automotive recycling center located in Janesville, WI.
- Swing-N-Slide - designs, manufactures and markets do-it-yourself wooden swing set kits, wooden climbing unit kits, plastic slides and related accessories
- VNE Corporation - manufacturer of sanitary stainless steel fittings, valves and unpolished industrial tube O.D. fittings including plug and butterfly valves, clamp and biopharm fittings
- Wisconsin Lakes Realty - sales of vacation and retirement properties in central Wisconsin
- WKPO - 105.9 Janesville, WI
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