This applet lets you share files easily:
Drag-and-drop a file on the icon to upload it to one of the available hosting sites.
You can upload text, image, video, files, and even the current clipboard
and you can choose amongst many sites, like DropBox, Imageshack, pastebin, etc
The resulting URL is automatically stored in the clipboard to be directly copied by CTRL+v.
It can keep an history of your last uploads to retrieve them without registering on the sites.
Press left-click to copy the latest URL into the clipboard, middle-click to copy it into the mouse selection.
You'll need to install 'curl' and 'wget' to upload the data.