Pixel/sprite art resources & tools

Pixel/sprite art tutorials. Working at a low resolution, with limited color palettes?
http://makegames.tumblr.com/post/42648699708/pixel-art-tutorial
http://pixeljoint.com/forum/forum_posts.asp?TID=11299
http://pixeljoint.com/pixels/tutorials.asp
http://www.hongkiat.com/blog/pixel-art-tutorials/
http://www.pixelprospector.com/the-big-list-of-pixel-art-tutorials/

A bunch of pixel art and pixel animation tutorials from Studio MiniBoss and Pedro Medeiros:
http://blog.studiominiboss.com/pixelart
https://www.patreon.com/saint11/posts?tag=tutorial

Huge "Pixels And Art Glossary":
https://pixelation.org/index.php?topic=19594.0

Color/palette ideas:
http://www.pixelfor.me/crc
https://color.adobe.com

Geared more for Photoshop, but still might be useful:
http://2dwillneverdie.com/tutorial/a-basic-sprite-tutorial/
http://2dwillneverdie.com/tutorial/picking-the-best-colors-for-your-sprite/

More info & resources:
http://pixeljoint.com
http://pixelation.org
http://opengameart.org
https://www.vg-resource.com/forumdisplay.php?fid=14

Tools:
https://www.aseprite.org - commercial software
https://www.aseprite.org/older-versions/ - freeware versions
http://www.cosmigo.com/pixel_animation_software - Pro Motion, commercial software & free edition
https://graphicsgale.com/us/ - became freeware in June 2017
http://pulkomandy.tk/projects/GrafX2 - free (90s GUI warning)
Even more options: http://pixeljoint.com/forum/forum_posts.asp?TID=2

Paint Shop Pro & Animation Shop (from Jasc FTP before Corel took everything over):
https://www.dropbox.com/s/4qb14g5pmct54hj/psp7trial.7z?dl=0 - installer
https://www.dropbox.com/s/gy0jis9bxw0qn8e/psp_4gb_patched.7z?dl=0 - 3gb+ patched files, allows you to work with a larger canvas and save/load larger files
https://www.dropbox.com/s/m0fe906e4ayx03f/psp.7z?dl=0 - portable app version (pre-patched for >3gb/LAA memory), if you know what you're doing get this one instead of the others

Never become this guy:
http://www.dinofarmgames.com/a-pixel-artist-renounces-pixel-art/