[Currently work in progress - I'm adding names for both already used ones & any I've downloaded, just to cover myself for future usage and to act sort of as a resources recs page too]
If you want to know where any fonts/brushes/textures/caps etc for a specific graphic came from/what they are then you can simply ask and I will dig up the info for you - all you need do is provide a link to the one you're curious about and what it is you want to know. :)
Screencaps
The 4400 - own,
dragonlady981SGA/SG1 - own, promo shots from Gateworld.net & Emedian (no longer up), Stargatecaps.com,
tehshroomPrimeval - own,
ravenlullaby, xsomethingbluex, seraphina_snape, moonlettuce & alyseMerlin - promo pics from screenrush.co.uk<>,
pothead, 
threelayers, _becca84_ and 
sparklpocalypseCrminals Minds -
princesskiwi07, midnight_coffee, slash_girlBeing Human -
hobbit_iconses, neptuneskisses, telltale & brownstudiesActors/Actresses -
gnimaerdCastle -
sapphsTen Inch Hero -
rayneloveStar Trek -
wickedgroundTextures etc -
realproofhttp://dani-dinoattack.deviantart.com/
mentahelada/yamhel_lansky/hl_upicsiconsbycurtanaohmystar/teh_ganduhttp://shatterheart.net/textures/
misartediablo_dancer/lovedontroamhttp://jordannamorgan.deviantart.com/
http://policromo.deviantart.com/
http://mutsie.deviantart.com/
http://nemesisdivina666.deviantart.com/
http://orchidsblood.deviantart.com/
chained_angel13/fuyunohttp://notfadeaway.deviantart.com
http://candycrack.deviantart.com/
http://tiffcali06.deviantart.com/
http://thesmurfzbabe.deviantart.com/
http://rubianca.deviantart.com/
evastefania/p_i_x_a_rshoqolad/distractiionsvol4itcaspiritcodacharlieandile_mot_artohfreckleselenehearteledhwen_girllyonchilde
purebloodiconschicnicetiesjadeleopardesqaire - esqa, girlinatree + hamynahawmpdotnet 