On LiveJournal, there is a weekly Stargate writing challenge community called sg_challenges. I've been a participant since the beginning, writing under the name martyfan, and so far I haven't missed a challenge. However, not every story will be listed on this page, since there have been occasional brief forays into Atlantis instead.

Solo Light
Challenge #1: Gold, Dress
Rating: G
Genre: Angst/Drabble
Spoilers: Meridian
Summary: "For the first few days, he barely notices."

Between Waves
Challenge #2: Water, Fire
Rating: G
Genre: Drama/Humor
Spoilers: None
Summary: SG-1 involuntarily bring back part of the beach with them.

Fortune and Glory
Challenge #3: Fear, Dark
Rating: G
Genre: Humor
Spoilers: None
Summary: Be careful what you ask your team.

In Plain Sight
Challenge #4: Discovery, Treasure
Rating: G
Genre: General
Spoilers: Avalon part 1, Avalon part 2, the Sangraal arc
Summary: Sometimes, what you're looking for is right under your nose.

A Little Loopy
Special Challenge #1 - April Fool's Day: A prank, Whoopee cushion
Rating: PG
Genre: Humor/AU
Spoilers: Window of Opportunity
Summary: Daniel gets stuck in the time loop instead of Teal'c.

Hanging On
Challenge #5: Insanity, Serenity
Rating: G
Genre: Angst/Drabble
Spoilers: Abyss
Summary: "He loses track of how many times they've done this."

Thinking of You
Challenge #6: Music, You'd like this song
Rating: PG
Genre: Angst/Double drabble
Spoilers: Meridian
Summary: Sam speaks to an absent friend.

He Followed Me Home
Challenge #7: Shoes, Holes
Rating: G
Genre: General
Spoilers: Children of the Gods
Summary: Jack extends the hand of friendship to someone who needs it.

Beware the Aliens
Challenge #8: A UFO, An abduction
Rating: G
Genre: Humor/Drabble
Spoilers: None
Summary: "The figure looked tiny against the massive mothership that hovered over him."

Pastafarianism
Challenge #9: Faith, Holy
Rating: PG
Genre: Humor/Drabble
Spoilers: Fallen, Homecoming
Summary: A member of SG-1 is mistaken for a whole new type of false god.

Soon
Challenge #10: Pattern, Silk
Rating: PG
Genre: Drama
Spoilers: Absolute Power
Summary: The Earth's future ruler contemplates his power.

Embrace
Special Challenge #2 - Mother's Day: Mothers, Instinct
Rating: PG
Genre: Angst
Spoilers: The Gamekeeper
Summary: Birth and rebirth.

Amongst Aliens
Challenge #11: Country, Guitar
Rating: G
Genre: General
Spoilers: Children of the Gods
Summary: Teal'c reflects on the Tau'ri.

All In Your Head
Challenge #12: Fanfiction, Book
Rating: G
Genre: Humor/Drabble
Spoilers: None
Summary: Daniel hates Dannywhumping.

Dead Man Walking
Special Challenge #3 - Memorial Day: Sacrifice, Memorial
Rating: G
Genre: General
Spoilers: Stargate the movie
Summary: After returning to Earth, Jack reflects.

Watching Over Him
Challenge #13: Love, Heartbreak
Rating: G
Genre: Romance
Spoilers: Icon
Summary: Leda encounters Daniel for the first time.

No One
Challenge #14: Letters, Initials
Rating: G
Genre: General
Spoilers: Stargate the movie
Summary: After Abydos, Jack writes letters to the families of the fallen.

Renewal
Challenge #15: Beginning and End, Middle
Rating: PG
Genre: Angst
Spoilers: Full Circle, Fallen, allusion to Threads
Summary: Daniel is forced to choose.

Lost and Found
Special Challenge #4 - Father's Day: Father, Son
Rating: PG
Genre: Angst
Spoilers: The Gamekeeper, Seth
Summary: A father and son are reunited at last.

Boldly Going
Challenge #16: Stars, Shimmer
Rating: G
Genre: General
Spoilers: None
Summary: "Sometimes it hits me out of nowhere, and I have to stop and think about what we're doing."

Wolfsbane
Challenge #17: Flowers, Vase
Rating: G
Genre: Humor/Drabble
Spoilers: Paws In the Moonlight
Summary: No one ever takes the werewolf thing seriously.

Captive
Challenge #18: Chair, Wood
Rating: G
Genre: General/Drabble
Spoilers: Prometheus Unbound
Summary: If only he'd known what he was getting into...

Burial
Special Challenge #6 - Independence Day: Independence, War
Rating: G
Genre: Angst/Drabble
Spoilers: Moebius part 1, Moebius part 2
Summary: He is the only one left.

Destructive Tendencies
Challenge #19: Mischief, "Oh boy, are you in trouble now!"
Rating: G
Genre: Humor
Spoilers: The Ties That Bind
Summary: Daniel is getting fed up with his little shadow.

Waiting
Challenge #22: Relaxation, Rest
Rating: G
Genre: Angst/Drabble
Spoilers: Nemesis
Summary: Daniel worries about his team.

Crushed
Challenge #23: Phone, "Can you hear me now?"
Rating: PG
Genre: Angst
Spoilers: General season ten spoilers
Summary: The end comes when you least expect it.

Family
Challenge #24: Ceremony, Dearly Beloved
Rating: G
Genre: General
Spoilers: Threads, Moebius part 2
Summary: SG-1 enjoy a little well-deserved downtime at Jack's cabin.

Drifting
Challenge #25: The ocean, Waves
Rating: G
Genre: General
Spoilers: The Pegasus Project
Summary: While waiting for the Odyssey to return, Daniel does some thinking.

Forbidden
Challenge #27: "What do you want from me?", "Everything."
Rating: G
Genre: Supernatural/Suspense
Spoilers: The Quest part 2, The Shroud
Summary: Adria reflects on Daniel Jackson.

Conjoined
Challenge #28: A new life, Birth
Rating: G
Genre: Angst/AU
Spoilers: Crusade
Summary: Vala ends up with a roommate.

Together With You
Challenge #29: Hair, Brushing
Rating: PG
Genre: Angst/AU
Spoilers: Crusade, Conjoined
Summary: Vala and Daniel learn what it means to share. Sequel to Conjoined.

Apart
Challenge #30: Family, Siblings
Rating: G
Genre: Angst
Spoilers: The Gamekeeper
Summary: "No one ever really understood what it meant to be in a foster home."

Puzzles
Challenge #31: Dreams, Sleep
Rating: G
Genre: Angst/Drama
Spoilers: Forever In a Day, Fallen
Summary: "Sometimes he dreams of running."

Top Dog
Challenge #32: Nails, Paint
Rating: PG
Genre: Supernatural/Drama
Spoilers: Paws In the Moonlight
Summary: Hammond catches a glimpse of Daniel's darker half.

Same Shit, Different Day
Challenge #34: Angst, Sorrow
Rating: PG
Genre: Humor/Drabble and a half
Spoilers: None
Summary: Oh, Daniel, it's always the same thing with you...

On the Other Side
Challenge #35: Bones, Death
Rating: G
Genre: Humor/Crossover
Spoilers: General knowledge of Discworld
Summary: Once again, Daniel runs into an old acquaintance.

Honor Guard
Challenge #36: Tears, Joy
Rating: G
Genre: Angst/Drabble and a half
Spoilers: Children of the Gods, Forever In a Day
Summary: "Two and a half years ago, when he promised they'd get Sha're back, he wasn't sure it was a promise he could keep."

Return to Sender
Special Challenge #7 - Christmas: Gifts, Holiday Cheer
Rating: G
Genre: Angst/Drabble and a half
Spoilers: Meridian, Full Circle, Fallen
Summary: Sam misses her friend.

Many Lifetimes
Challenge #37: Sight, Invisible
Rating: G
Genre: General
Spoilers: The Quest part 2, Before I Sleep (Atlantis)
Summary: When he wakes up, something is different.

Some of These Apples
Challenge #38: Plant, Grow
Rating: PG
Genre: Humor
Spoilers: None
Summary: Jack always complains about the trees. Turnabout is fair play...

Must Go Faster
Challenge #39: Attack, Ambush
Rating: PG-13
Genre: Horror/Suspense
Spoilers: None
Summary: While on a mission with SG-4, Daniel learns what it means to be hunted.

Trust
Challenge #40: Breaking, Glass
Rating: PG
Genre: Angst/Suspense
Spoilers: The Shroud
Summary: Jack has to make a choice.

Wasp
Challenge #41: Cold, Sneezing
Rating: G
Genre: Angst/Suspense
Spoilers: The Shroud
Summary: Sam contemplates an unpleasant thought.

Subtle Like a Brick to the Head
Challenge #42: A kiss, Lips
Rating: PG-13
Genre: Humor/Romance
Pairing: Daniel/Vala
Spoilers: Up to The Ties That Bind
Summary: Vala discovers Valentine's Day and is determined to celebrate it.

$14.95 Plus Tax
Challenge #43: Action, Firefight
Rating: G
Genre: Futurefic/Humor
Spoilers: None
Summary: After the wars end and the Stargate program is made public, SG-1 have retired.

It Followed Me Home
Challenge #44: Children, Babies
Rating: PG
Genre: General/Humor
Spoilers: None
Summary: Daniel finds a stray. Jack is less than thrilled.

Pulling Pigtails
Challenge #45: An annoyance, "Why do you have to be so irritating?"
Rating: PG-13
Genre: General/Romance
Spoilers: Avalon part 1
Summary: Vala is easily bored. Daniel tries not to care.

Without a Purpose
Challenge #46: Spring
Rating: G
Genre: Angst
Spoilers: Unending
Summary: Daniel feels useless.

Delicious Symbolism
Challenge #47: Eggs, Easter
Rating: G
Genre: Humor
Spoilers: None
Summary: Teal'c is confronted with Easter candy for the first time.

The Military Mind
Challenge #48: A geek, "Pure genius."
Rating: G
Genre: General
Spoilers: None
Summary: If it doesn't work, blow it up.

Man, I Feel Like a Woman
Challenge #49: An episode tag
Rating: PG
Genre: Humor
Spoilers: Crusade
Summary: "There were many things Cameron Mitchell never saw coming. The existence of aliens, Jaffa ambushes, the fact that the Asgard went around stark naked... At least they were all par for the course. Jackson whistling at his towel-clad ass trumped them all."

Shipping and Handling
Challenge #50: Technology, "Oops, I think I broke it."
Rating: G
Genre: Futurefic/Humor
Spoilers: $14.95 Plus Tax
Summary: You will grow old, but you never have to grow up. Sequel to $14.95 Plus Tax

Code 17
Challenge #51: An injury, "Stat!"
Rating: PG
Genre: General
Spoilers: Lifeboat
Summary: Appearances can be deceiving.

More to come...