Imageshack Desktop Uploader is small portable free application which can upload one or more images, videos to imageshack.us and moreover you can upload to imageshack with this application in both cases either you have an account on imageshack or upload images anonymously.
Recently tool has been made to support Mac and Linux also and support some extra languages has also been added. With this application what ever you upload can be shared in twitter via yfrog, you can add tags, you can preview your upload, drag and drop image to upload and lot more other new features has been added which you will notice once you use this application.
You can also configure the privacy settings for the images you upload, but you will need logged into the application with a imageshack account.
Download Imageshack Uploader for Windows, Mac and Linux