This is an old resource post that I will be slowly working on since it's totally outdated.
Guide on using: screencaps, photoshop, cropping, textures
aspect ratio by dtissagirl
photoshop I by ealias
photoshop II by ealias
midnight_road vividtruth sarah_stc push_the_river uncreativ toybirds trueasthenight tearjerkericons soaked crimsonxicons vert_gazon spooky_window [Unknown LJ tag] satin_resonance
99mockingbirds @ 99mockingbirds
For the colorings, you can check this link out.
For more colorings but in .psd packs, follow this link out.
If you see something used in the icons that hasn't been credited, please let me know and I'll make the proper correction. Thank you!!