All of these fics can be found at various archives:
Silverlake + Sam/Jack Directory + Stargate Translations + /write : elite fan fiction

Last/First Day
Future drabble. No spoilers.
[Sam/Jack; rated PG-13]

The Night
Future drabble. No spoilers.
[Sam/Jack; rated PG-13]

For Her
Sam's thoughts about Jack during the telescope scene of Forsaken.
[Sam/Jack; rated PG-13]

That Laugh
Jack watches Jonas and Sam talk.
[Sam/Jack, Jonas Quinn; rated PG]

Want
Daniel struggles with unforeseen emotions after Cassandra's rescue.
[Daniel/Sam, Daniel/Sha're, Jack; rated PG]

Rhythms and Rituals
The undertones to the fishing invitation in Sight Unseen.
[Sam/Jack; rated PG]

Pumpkin Face
A Halloween fic.
[Jack, Daniel, Teal'c, Sam, some aliens and some alien kids; rated PG]