ShareX is an open source program that lets you take screenshots or screencasts of any selected area with a single key, save them in your clipboard, hard disk or instantly upload them to over 30 different file hosting services. It can also upload images, text files and all other different file types. It is able to capture screenshots with transparency and shadow.
Capture methods: Fullscreen, Active window, Window list, Window & Rectangle, Rectangle, Rounded rectangle, Ellipse, Triangle, Diamond, Polygon, Free hand, Last region, Screen recording
Upload methods: File upload, Clipboard upload, Drag and drop, Send to from Windows Explorer, Watch folder
Image uploaders: imageshack.us, tinypic.com, imgur.com, flickr.com, photobucket.com, picasaweb.google.com, uploadscreenshot.com, twitpic.com, twitsnaps.com, yfrog.com, imm.io, File uploader
Text uploaders: pastebin.com, pastebin.ca, paste2.org, slexy.org, pastee.org, paste.ee, File uploader
File uploaders: dropbox.com, rapidshare.com, sendspace.com, minus.com, box.com, ge.tt, Custom uploader, FTP server, Shared folder, Email
URL shorteners: goo.gl, bit.ly, j.mp, is.gd, tinyurl.com, turl.ca
Social networking services: twitter.com