LiveJournal Icons
This is an abbreviated collection of LiveJournal icons sourced from 2005 to 2010. Icon selection was a crucial tool of user-to-user communication; a user could have up to 15 different 100x100 icons (I seem to recall it was up to 30 back in the day). While you would pick a default icon to be displayed on your profile and in friend lists, different icons could be selected for new comments and entries, making the icon a shorthand for communicating your emotional or mental state at the time of posting. You might also choose a relevant icon for your posts in a fandom community to signal your allegiance to a character or ship.
Each icon lists a brief description of the image, the year I saved it to my hard drive, and any notes that might be helpful for understanding it in a historical context.

Saved June 4, 2007

Saved August 15, 2007
Snakes on a Plane, starring Samuel L. Jackson, released August 18, 2006; Harry Potter and the Deathly Hallows, in which Neville beheads a magical snake, released July 14, 2007

Saved July 29, 2007

Saved August 18, 2006

Saved May 27, 2007
300, a movie about the Battle of Thermopylae based on the Frank Miller comic and popular among male nerds and wannabe alphas alike, released March 9, 2007

Saved October 23, 2007

Saved November 15, 2007

Saved December 29, 2005

Saved May 10, 2007

Saved February 7, 2007

Saved March 27, 2007

Saved June 2, 2007

Saved January 19, 2007

Saved July 30, 2007

Saved April 7, 2007

Saved March 3, 2007
Stargate: SG-1 aired on Showtime and Scifi from 1997-2007; "cake or death" is an Eddie Izzard bit from 1998.

Saved February 22, 2007

Saved April 21, 2007

Saved September 21, 2006

Saved August 16, 2006
Saved July 5, 2006