WWON

930 AM WWON plays Country music in Waynesboro, Tennessee
 

WRAR

A window cling sticker from Hot AC 105.5 FM WRAR licensed to Tappahannock, Virginia.
 

WARO

"94.5 The Arrow" WARO plays Classic Rock in Fort Myers/Naples, Florida.
 

WKAL

1450 AM WKAL is a Talk/Sports station licensed to Rome, New York.  They went through about eight call letter changes from 1988 until 2012 when they became WKAL again.  The "KAL" in the call letters represents Myron Kallet who signed the station on the air in November 1946 from studios in the Capitol Theatre which he also owned.  WKAL's FM sister station at 95.9 was on the air from 1968 until 1988.
 

WFBC

93.7 FM WFBC went on the air in Greenville, South Carolina in 1947.  They currently carry a Top-40 format as "B93.7"  From 1933 until 1997 sister station WFBC-AM broadcast at 1200 and later 1330 AM.  Another WFBC-FM sticker can be seen here.
 

WCBN

88.3 FM WCBN (W Campus Broadcasting Network) is the student-run station at the University of Michigan in Ann Arbor, MI.  Radio at the UofM began in the early 1950s with carrier current broadcasts which lasted until 1972 when WCBN went on the air at 89.5 FM.  They moved to 88.3 FM in 1977.  Along with specialty shows, WCBN primarily airs a Freeform format which allows DJs complete freedom to play what they want including the mixing of multiple musical genres.
 

KVI

101.5 FM KVI was a Top-40 station in Seattle, Washington circa the mid-to-late 1970s.
 

KRKQ

"Mountain Chill" was an online-only station for almost a decade before broadcasting at 95.5 FM began in 2011.  They air a Chill format which includes Electronica, Downtempo, Dub, Reggae and Ambient music.  They are the only commercial, terrestrial station with a full-time Chill format that I know of.  KRKQ broadcasts with 250-watts and is licensed to Mountain Village, Colorado near Telluride.
 

KGTM

A 1999 sticker from Alternative Rock station "98X" KGTM in Idaho Falls, Idaho.
 

KAYO

99.3 FM KAYO was a Country station in Aberdeen, Washington.  Sister station KAYO 1450 AM is now News/Talk station KBKW.
 

CFQM

"103.9 Max FM" CFQM is a Classic Hits station in Moncton, New Brunswick.  The 70,000-watt station carried a Country format from 1979 until 1998.
 

CJUC

92.5 FM CJUC is a volunteer-run, community radio station broadcasting from Whitehorse, Yukon.  The 50-watt station went on the air in 2003.  Listening live to "The Juice" while making this post I enjoyed hearing Ska Party Radio with upbeat tunes from Los Furios, Dr. Ring Ding, The Abruptors and The Skadoos.
 

WHCF

88.5 FM WHCF is a Contemporary Christian station in Bangor, Maine.
 

WEJL

A t-shirt from 630 AM WEJL in Scranton, Pennsylvania.  Their call letters stand for (W) Edward J Lynett--the publisher of The Scranton Times newspaper who founded the station in 1923 as WQAN.  WEJL currently carries a Sports format as an ESPN Radio affiliate. 
 

KWYY

A Wyoming-shaped decal from 95.5 FM KWYY in Casper, WY.
 

WQCM

94.3 FM WQCM plays Classic Rock in Hagerstown, Maryland.  Prior to around 2003 WQCM broadcast at 96.7 FM.
 

CFUR

A sticker and brochure from 88.7 FM CFUR in Prince George, British Columbia.  "The FUR" went on the air in September 2001 and is based at the University of Northern British Columbia.

WBBW

1240 AM WBBW is a Sports station in Youngstown, Ohio.  They've been on the air since February 1949.
 

WCER

900 AM WCER was on the air in Canton, Ohio from 1992 until 2011. 
 

2GO

2GO went on the air in 1971 originally on the AM band.  They moved to 107.7 FM in the early 1990s and currently carry the call letters 2GGO.  2GO was licensed to Gosford, New South Wales, Australia.