Please note, this is for my personal reference and is in no way meant to be a comprehensive list of series.
Also, some series may be still incomplete.
Terry Brooks

The Sword of Shannara
The Elfstones of Shannara
The Wishsong of Shannara

The Heritage of Shannara
The Scions of Shannara 
The Druid of Shannara 
The Elf Queen of Shannara 
The Talismans of Shannara

Shannara Trilogy Prequel
First King of Shannara

The Voyage of the Jerle Shannara
Ilse Witch 

The Magic Kingdom of Landover
Magic Kingdom For Sale -- Sold! 
The Black Unicorn 
Wizard At Large 
The Tangle Box 
Witches' Brew

Sara Douglass

The Wayfarer Redemption
The Wayfarer Redemption
The Troy Game
Hades' Daughter

Kate Elliott

Crown of Stars
King's Dragon
Prince of Dogs
The Burning Stone
Child of Flame
Crown of Stars

Terry Goodkind

The Sword of Truth
Wizard's First Rule
Stone of Tears
Blood of the Fold
Temple of the Winds
Soul of the Fire
Faith of the Fallen
Pillars of Creation
Debt of Bones (short novella)

Barbara Hambly

The Windrose Chronicles
The Silent Tower
The Silicon Mage
Dog Wizard

The Darwath Trilogy
The Time of the Dark
The Walls of Air
The Armies of Daylight
Mother of Winter
Icefalcon's Quest

Sun Wolf and Starhawk
The Ladies of Mandrigyn
The Witches of Wenshar
The Dark Hand of Magic

The Rainbow Abyss
The Magicians of Night

Knight of the Demon Queen


Tara K. Harper

Tales of the Wolves
Shadow Leader
Storm Runner
Wolf's Bane

Elizabeth Haydon

Rhapsody Trilogy

Symphony of Ages
Requiem for the Sun
Elegy for a Lost Star

Tanya Huff

Sing the Four Quarters
Fifth Quarter
No Quarter
The Quartered Sea

The Keeper's Chronicles
Summon the Keeper
The Second Summoning

J. V. Jones

The Book of Words
The Baker's Boy
A Man Betrayed
Master and Fool
The Barbed Coil

Sword of Shadows
A Cavern of Black Ice

Mercedes Lackey

She gets her own page here.

George Lucas and Chris Claremont

Sequel Trilogy to Willow
Shadow Moon
Shadow Dawn
Shadow Star

Anne McCaffrey

She gets her own page here.

L. E. Modesitt, Jr.

The Spellsong Cycle
The Soprano Sorceress
The Spellsong War
Darksong Rising

Janny Wurts

Wars of Light and Shadow
Curse of the Mistwraith
Ships of Merior
Warhost of Vastmark
Fugitive Prince
Grand Conspiracy
Peril's Gate
Stormed Fortress