These are some of my favorite "Photoshops" I have done for contests on FARK.com under the name h2ogate. I usually do my editing with The GIMP on a FreeBSD system.
Click on the thumbnails to see full-sized versions of the pictures.

Photoshop Wil and his cool new shirt http://forums.fark.com/cgi/fark/comments.pl?IDLink=1765420 Another 1st place! Cool!
Animated GIF contest, something to do with a phone: 4th place. http://forums.fark.com/cgi/fark/comments.pl?IDLink=834820
Wow! This one is a winner! Thanks to everyone who voted.
Photoshop the UN's chief weapons inspector and the Iraqi foreign ministerhttp://forums.fark.com/cgi/fark/comments.pl?IDLink=359810
Photoshop theme: What would you *really* like to see stocked at Home Depot?http://forums.fark.com/cgi/fark/comments.pl?IDLink=283265
This one pretty much tied with Alexandhisdroogs ( http://cgi.fark.com/cgi/fark/users.pl?login=Alexandhisdroogs ) for first place. My first entry that ever hit number one!
Caption reads: You already know what he's thinking...
Photoshop this extreme wheelbarrower (I submitted this link)http://forums.fark.com/cgi/fark/comments.pl?IDLink=267045
Photoshop farker citizenj for his b-day. Not only did his friends forget him, but he's stuck at work until tomorrowhttp://forums.fark.com/cgi/fark/comments.pl?IDLink=283618
Photoshop this boxer who is constricting anus 100 times to goodbye depression http://forums.fark.com/cgi/fark/comments.pl?IDLink=281923
Photoshop this airman in his miniature jethttp://forums.fark.com/cgi/fark/comments.pl?IDLink=580188
Another winner!
Jerkcity wants farkers to photoshop themhttp://forums.fark.com/cgi/fark/comments.pl?IDLink=269627
Photoshopper inside joke.
Photoshop Israel's new secret weaponhttp://forums.fark.com/cgi/fark/comments.pl?IDLink=308127
Photoshop the new Star Wars DVD cover
Photoshop this visitor at the Global Flower Horn Fish Mega Exhibition in Kuala Lumpurhttp://forums.fark.com/cgi/fark/comments.pl?IDLink=281353
Monday Photoshop Theme: Make your own Andre the Giant "Posse" posterhttp://forums.fark.com/cgi/fark/comments.pl?IDLink=275667
Photoshop Mariners Coach Lou Piniella getting really, really madhttp://forums.fark.com/cgi/fark/comments.pl?IDLink=305141
New Hello Kitty products
Theme: Unlikely reality shows.http://forums.fark.com/cgi/fark/comments.pl?IDLink=271238
"He's MY boyfriend, you little TRAMP." Photoshop this Afghani-style catfight. Meow.http://forums.fark.com/cgi/fark/comments.pl?IDLink=295653
Photoshop Jackie Chanhttp://forums.fark.com/cgi/fark/comments.pl?IDLink=305936
Photoshop your own comic book cover (This link goes to an old Weird Science comic) Apologies to Kelly Freashttp://forums.fark.com/cgi/fark/comments.pl?IDLink=246967
Theme: Now that Rosie O'Donnell is quitting her own magazine, PS the next big celebrity magazine http://forums.fark.com/cgi/fark/comments.pl?IDLink=322474
Photoshop Theme: Create your own "Mr. Men" book Original artwork by yours truly. Thank you, thank you.http://forums.fark.com/cgi/fark/comments.pl?IDLink=299999&ok=true
Photoshop Theme: Create your own "Mr. Men" bookhttp://forums.fark.com/cgi/fark/comments.pl?IDLink=299999
Photoshop theme: Design an unlikely 70's style "Kustom Kar" (e.g. Batmobile, Monkeemobile, etc) for a TV show past or present (link is to inspiration)http://forums.fark.com/cgi/fark/comments.pl?IDLink=291747
Theme: Failed celebrity-named magazineshttp://forums.fark.com/cgi/fark/comments.pl?IDLink=275691
and...
Theme: Now that Rosie O'Donnell is quitting her own magazine, PS the next big celebrity magazinehttp://forums.fark.com/cgi/fark/comments.pl?IDLink=322474
Photoshop Israel's new secret weaponhttp://forums.fark.com/cgi/fark/comments.pl?IDLink=308127
Photoshop Colin Powells new secret movehttp://forums.fark.com/cgi/fark/comments.pl?IDLink=305417
Theme: Create an image with a hidden message for Al Qaeda in ithttp://forums.fark.com/cgi/fark/comments.pl?IDLink=246623
Photoshop a classic NES game. Examples given.http://forums.fark.com/cgi/fark/comments.pl?IDLink=198281
Theme: Design an unlikely ad for Altoids. Sample providedhttp://forums.fark.com/cgi/fark/comments.pl?IDLink=290105
Reno Smash Puny Humans.http://forums.fark.com/cgi/fark/comments.pl?IDLink=296814
Photoshop a cover of a "for Dummies" book. Link points to samplehttp://forums.fark.com/cgi/fark/comments.pl?IDLink=236126

Comments to: Paul J. White

Entire list photoshops (not necessarily interesting) here.