As could be expected, there were some I liked and others I disliked. My favourites (in order of publication) were:
Rabbit Hill (1945, Robert Lawson)When You Reach Me is my single, number-one favourite, closely followed by Dicey's Song — I enjoyed Dicey and its prequel, Homecoming, so much that I went on to read three other books in the series — and Frankweiler, which I've read several times through the years....
Miracles on Maple Hill (1957, Virginia Sorensen)
Onion John (1960, Joseph Krumgold)
From the Mixed-Up Files of Mrs Basil E Frankweiler (1968, E L Konigsburg)
Roll of Thunder, Hear My Cry (1977, Mildred D Taylor)
The Westing Game (1979, Ellen Raskin)
Dicey's Song (1983, Cynthia Voigt)
Number the Stars (1990, Lois Lowry)
Maniac Magee (1991, Jerry Spinelli)
Walk Two Moons (1995, Sharon Creech)
The Graveyard Book (2009, Neil Gaiman)
When You Reach Me (2010, Rebecca Stead)
The complete list:
1922: The Story of Mankind, by Hendrik Willem van LoonAs you can see, a few fortunate writers have won the medal twice: Joseph Krumgold (1954 and 1960), Elizabeth George Speare (1959, 1962), E L Konigsburg (1968, 1997), Katherine Paterson (1978, 1981) and Lois Lowry (1990, 1994), Kate DiCamillo (2004, 2014). Sharon Creech was the first author to receive both the Newbery Medal (1995) and its British equivalent, the Carnegie Medal (2002, for Ruby Holler); Neil Gaiman did her one better by receiving both awards for the same book, The Graveyard Book (Newbery 2009, Carnegie 2010).
1923: The Voyages of Doctor Dolittle, by Hugh Lofting
1924: The Dark Frigate, by Charles Hawes
1925: Tales from Silver Lands, by Charles J Finger
1926: Shen of the Sea, by Arthur Bowie Chrisman
1927: Smoky, the Cowhorse, by Will James
1928: Gay Neck, the Story of a Pigeon, by Dhan Gopal Mukerji
1929: The Trumpeter of Krakow, by Eric P. Kelly
1930: Hitty, Her First Hundred Years, by Rachel Field
1931: The Cat Who Went to Heaven, by Elizabeth Coatsworth
1932: Waterless Mountain, by Laura Adams Armer
1933: Young Fu of the Upper Yangtze, by Elizabeth Lewis
1934: Invincible Louisa: The Story of the Author of Little Women, by Cornelia Meigs
1935: Dobry, by Monica Shannon
1936: Caddie Woodlawn, by Carol Ryrie Brink
1937: Roller Skates, by Ruth Sawyer
1938: The White Stag, by Kate Seredy
1939: Thimble Summer, by Elizabeth Enright
1940: Daniel Boone, by James Daugherty
1941: Call It Courage, by Armstrong Sperry
1942: The Matchlock Gun, by Walter Edmonds
1943: Adam of the Road, by Elizabeth Janet Gray
1944: Johnny Tremain, by Esther Forbes
1945: Rabbit Hill, by Robert Lawson
1946: Strawberry Girl, by Lois Lenski
1947: Miss Hickory, by Carolyn Sherwin Bailey
1948: The Twenty-One Balloons, by William Pène du Bois
1949: King of the Wind, by Marguerite Henry
1950: The Door in the Wall, by Marguerite de Angeli
1951: Amos Fortune, Free Man, by Elizabeth Yates
1952: Ginger Pye, by Eleanor Estes
1953: Secret of the Andes, by Ann Nolan Clark
1954: ...And Now Miguel, by Joseph Krumgold
1955: The Wheel on the School, by Meindert DeJong
1956: Carry On, Mr Bowditch, by Jean Lee Latham
1957: Miracles on Maple Hill, by Virginia Sorensen
1958: Rifles for Watie, by Harold Keith
1959: The Witch of Blackbird Pond, by Elizabeth George Speare
1960: Onion John, by Joseph Krumgold
1961: Island of the Blue Dolphins, by Scott O'Dell
1962: The Bronze Bow, by Elizabeth George Speare
1963: A Wrinkle in Time, by Madeleine L'Engle
1964: It's Like This, Cat, by Emily Neville
1965: Shadow of a Bull, by Maia Wojciechowska
1966: I, Juan de Pareja, by Elizabeth Borton de Trevino
1967: Up a Road Slowly, by Irene Hunt
1968: From the Mixed-Up Files of Mrs Basil E Frankweiler, by E L Konigsburg
1969: The High King, by Lloyd Alexander
1970: Sounder, by William H Armstrong
1971: The Summer of the Swans, by Betsy Byars
1972: Mrs Frisby and the Rats of NIMH, by Robert C O'Brien
1973: Julie of the Wolves, by Jean Craighead George
1974: The Slave Dancer, by Paula Fox
1975: M C Higgins, the Great, by Virginia Hamilton
1976: The Grey King, by Susan Cooper
1977: Roll of Thunder, Hear My Cry, by Mildred D Taylor
1978: Bridge to Terabithia, by Katherine Paterson
1979: The Westing Game, by Ellen Raskin
1980: A Gathering of Days: A New England Girl's Journal, 1830-1832, by Joan W Blos
1981: Jacob Have I Loved, by Katherine Paterson
1982: A Visit to William Blake's Inn: Poems for Innocent and Experienced Travelers, by Nancy Willard
1983: Dicey's Song, by Cynthia Voigt
1984: Dear Mr Henshaw, by Beverly Cleary
1985: The Hero and the Crown, by Robin McKinley
1986: Sarah, Plain and Tall, by Patricia MacLachlan
1987: The Whipping Boy, by Sid Fleischman
1988: Lincoln: A Photobiography, by Russell Freedman
1989: Joyful Noise: Poems for Two Voices, by Paul Fleischman
1990: Number the Stars, by Lois Lowry
1991: Maniac Magee, by Jerry Spinelli
1992: Shiloh, by Phyllis Reynolds Naylor
1993: Missing May, by Cynthia Rylant
1994: The Giver, by Lois Lowry
1995: Walk Two Moons, by Sharon Creech
1996: The Midwife's Apprentice, by Karen Cushman
1997: The View from Saturday, by E L Konigsburg
1998: Out of the Dust, by Karen Hesse
1999: Holes, by Louis Sachar
2000: Bud, Not Buddy, by Christopher Paul Curtis
2001: A Year Down Yonder, by Richard Peck
2002: A Single Shard, by Linda Sue Park
2003: Crispin: The Cross of Lead, by Avi
2004: The Tale of Despereaux: Being the Story of a Mouse, a Princess, Some Soup, and a Spool of Thread, by Kate DiCamillo
2005: Kira-Kira, by Cynthia Kadohata
2006: Criss Cross, by Lynne Rae Perkins
2007: The Higher Power of Lucky, by Susan Patron, illustrated by Matt Phelan
2008: Good Masters! Sweet Ladies!: Voices from a Medieval Village, by Laura Amy Schlitz
2009: The Graveyard Book, by Neil Gaiman
2010: When You Reach Me, by Rebecca Stead
2011: Moon Over Manifest, by Clare Vanderpool
2012: Dead End in Norvelt, by Jack Gantos
2013: The One and Only Ivan, by Katherine Applegate
2014: Flora & Ulysses: The Illuminated Adventures, by Kate DiCamillo
2015: The Crossover, by Kwame Alexander
2016: Last Stop on Market Street, by Matt de la Peña
2017: The Girl Who Drank the Moon, by Kelly Barnhill
2018: Hello, Universe, by Erin Entrada Kelly
2019: Merci Suárez Changes Gears, by Meg Medina
2020: New Kid, by Jerry Craft
2021: When You Trap a Tiger, by Tae Keller
As far as I know, all of these are still in print and available through Amazon and Barnes & Noble (although I recommend buying them through an independent bookseller instead) except Daniel Boone, which is much too racist for modern sensitivities.