I found this little free gem recently called lightshot.
Comes as a desktop install -
http://lightshot.skillbrains.com/or firefox add-on ( i have both installed) -
https://addons.mozilla.org/en-US/firefox/search/?q=lightshot&cat=all&appver=3.6.18&platform=windowsIt's a screen capture utility that pop's up when you press PrtScn(printScreen) button on windows.
You can -
Upload and edit your screencap.
Adjust the selection box size.
Save directly to your harddrive.
Plus has Facbook & Twitter share options etc. .
All uploaded screen caps are saved online anonymously to Imageshack.
( there is a process to find and edit/delete any uploaded screen grab on imageshack, but it's a hack sort of, and not a built-in part of the lightshot program).
sample -
http://prntscr.com/3axj1EDIT --------
Plus, when you edit(upload) an image online, your given options to save your image to --
Your Computer
imm.io
pixir library
Facebook
Flickr
Picasa
And the on-line editor has a "login" option so you can create an account if you wanted too.
I haven't done that myself, so i cant say what new options that may bring.
Second edit ----
when you upload ( not for editing, just for sharing), keep/bookmark the prntscr.com link --example --
http://prntscr.com/3bek3http://prntscr.com/3bebgthen later, you can add "/edit" onto the end of the link, and you can edit the image online --example --
http://prntscr.com/3bebg/edit