Image Uploader alternatives
Uploading and screenshoting:
ShareX
ShareXmod
Lightshot
PickPick
monosnap
Greenshot
KiberInfinity's Screen Shooter
File & Image Uploader
Snagit ($$)
clip2net.com
jetscreenshot.com
joxi.ru
shup.com
http://screenpic.net/
pixlr.com
droplr.com
JShot
FluffyApp
Shotty
gyazo.com
QIP Shot
snag.gy (HTML5)
Jumpshare
Shutter (Linux)
Pioneer Screenshoter
floomby.ru
licecap - not really an alternative, but a lighweight and opensource program for screen capturing to GIF
Making video snapshots:
MPC (video player)
Batch Video to Image Extractor
FrameShots ($$)
Able Video Snapshot ($$)