ICMOA - Illinois Coin Machine Operators Association
- Formed by businesses to promote the coin operated amusement machine industry within the state. Hosts the annual State Pool and Dart Tournament which also includes tournaments for other coin-op games such as pinball, basketball and video games. Events cale
- http://www.icmoa.org/

Illinois Society of Association Executives (ISAE)
- Develops and encourages the practice of high standards of personal and professional conduct among executives serving trade, technical, business and professional associations. Includes member services, career center, programs and events calendar.
- http://www.isae.com/

Illinois Society of Professional Engineers
- A state society of the National Society of Professional Engineers that provides information, guidance, schedules and information on engineers. Regional chapters, activities and events calendar, membership details are featured.
- http://www.ilspe.com/

IPMA-IACS: Illinois Petroleum Marketers Association / Illinois Association of Convenience Stores
- Promoting a more profitable marketing environment for the state's petroleum marketers and convenience store operators. Includes details of its programs, services and member benefits.
- http://www.ipma-iacs.org/

IRMA - Illinois Retail Merchants Association
- Statewide organization serving over 23,000 merchants. Includes membership information, legislation issues, contacts, and links.
- http://www.irma.org/

IMAWA - Illinois Movers' and Warehousemen's Association
- Provides consumers with resources to make informed decisions on moving and storage of residential and commercial property. Also features education, resources, support and networking for trade professionals.
- http://www.imawa.com/

Illinois Professional Land Surveyors Association
- Topics, conference and seminar listing, and student and public information. Based in Rochester.
- http://www.iplsa.org/

Mediation Council of Illinois
- Committed to fostering the development of high professional standards and public awareness of mediation.
- http://mediate.com/illinois/

Illinois Nurserymen's Association
- For growers, landscapers, and nursery professionals.
- http://www.ina-online.org/