Whether you need help with an error message or just want to show off your new desktop wallpaper, Twitter can be a good place to share all those screenshot images with the world.
Now capturing screenshots of anything on your desktop screen is easy but let’s explore a couple of ways that will enable you publish these screenshot images on to your Twitter account as a tweet quickly and effortlessly.

TechSmith Jing (Mac & Windows)

With TechSmith Jing, you can quickly grab a screenshot, add some text notes or annotate your image with arrows and basic shapes. Once you are done editing, the image gets uploaded to your free screencast.com account and the URL is automatically copied to the clipboard so you can easily paste that in your tweets.
That’s one way of doing things but let me share another Jing trick here.
Other than Screencast.com, Jing can also upload screenshot images to your Flickr account. Open Twittergram and associate your Flickr account with Twitter using the tag TechSmithJing. Now anything you upload on Flickr through Jing will automatically get pushed to your Twitter stream without you having to tweet about it. How cool.

Kwout (Web Based)

If you need to screen capture a web page for publishing on to Twitter, check out Kwout. You can either copy-paste the web page address that you want to screen capture or use a bookmarklet.
Kwout will help you capture as well host the screenshot image and you can post the link on Twitter directly from Kwout’s site. The very interesting part is that all hyperlinks in the screenshot remain clickable (see example) because Kwout uses an imagemap for screenshots.

ScreenTweetr (Mac, Windows, Linux)

ScreenTweetr is another interesting Adobe AIR app developed by James Ford.
The app stays minimized in the system tray but automatically wakes up as soon you do a screen capture on Mac (Shift-Control-Command-3) or a Windows PC (Print Screen) . It will upload the screenshot image (or the contents of your clipboard) on to Twitpic from where you can tweet it.

Skitch (Email to Twitter)

Like Jing, Skitch is both a screen capture software and a screenshot hosting service. If you have a Mac, you can capture and upload screenshots to Skitch from the desktop itself but Windows users will have to send their screenshots to a secret email address for posting them on to Skitch (see example).
Skitch also provides an "email to twitter" option so you can send in screenshots from iPhone, BlackBerry or your mobile phone to Skitch and the images will then auto-appear in your Twitter timeline.