Folding Bike Manufacturers
Ace Bike, Inc.
Airnimal
Bazooka
Blanc Marine
Birdy
Bike Friday
Breezer
Brompton
Dahon
Di Blasi
Downtube
Giant
GoBike
Island Hopper
KHS
Kinn-Ovations
Montague
Moulton
Nexibike
PCS-Chrmoex
Peregrine Bicycle Works (PBW)
Puma
S & S Couplings
Slingshot
Swift
Strida
Trek
Yeah

Raleigh Twentys
Chris Heg's Super Modifed Raleigh Twenty
Mark Rehder's Raleigh Twenty Page
Retro Raleighs
Rydjor Bike Shop's 1973 Raleigh Twenty
Sheldon Brown's Raleigh Twenty Bicycle Page
Twenty Years on a Twenty 

Chicagoland Transit
Amtrak
Coach USA/Airport Express
CTA (Chicago Transit Authority)
East Chicago Transit
Greyhound
Hammond Transit System
LCEOC Transaction
Metra
Pace
South Shore (NICTD)
Transpo South Bend

Law and Safety
Bicycle Helmet Safety Institute
Illinois Bicycle Rules of the Road
Illinois Satutes Regarding Bicycles
Indiana Bicycle Law
Michigan Vehicle Code Pertaining to Bicycles
Safe Bicycling in Chicago Quick Reference
Wisconsin Bicycle Rules

Advocacy - Chicagoland
Bicycling in LaPorte County
BikeChicago Discussion Group
Break the Gridlock
Calumet Crank Club
Calumet Citizens for Connecting Communities
Campaign for Better Transit
CATS (Chicago Area Transportation Study)
CBF (Chicagoland Bicycle Federation)
CDOT (Chicago Department of Transportation)
Chicago Bike Winter
Chicago Blueways
Chicago Carfree Discussion Group
Chicago Critical Mass
Chicago Cycling Club
Chicago Transit Discussion Group
Circle Cycle Club
Citizens Taking Action
CNT (Center for Neighborhood Technology)
Cycling Sisters
Folks on Spokes Bicycle Club
Friends of the Bloomingdale Trail
Friends of the Pumpkinvine Nature Trail
Indiana Bicycle Coalition
League of Illinois Bicyclists
MBA (Michiana Bicycle Association)
NIPC (Northeastern Illinois Planning Commission)
NIRPC (Northwest Indiana Regional Planning Commission)
Soles and Spokes
Windy City Cycling Club

Advocacy - National
America Bikes
Bicycle Action Project
Bicycle Friendly Community Campaign
Bicycle Lobby
Bicycling Advocacy Discussion Group
bicyclinginfo.org
Bikes Belong
Carbusters
Carfree Discussion Group
Carfree Cities Discussion Group
Center for Commuter Studies
Critical Mass
LAB (League of American Bicyclists)
National Center for Bicycling & Walking
PedNet (Pedestrian and Pedaling Network)
Rails-to-Trails Conservancy
STPP (Surface Transportation Policy Project)
TEA-21 (Transportation Equity Act for the 21st Century)
Thunderhead Alliance
Trails and Greenways Discussion Group
Transportation Alternatives
World Carfree Network