Stephanie Leary

This plugin appends the author’s display name to posts and/or pages. There is an option to turn off the display on your own site, so the signature is visible only in feeds and crossposted content.

Post Signature

Appends the post author's display name to posts. Useful for multi-author blogs that are crossposted elsewhere, such as LiveJournal or Facebook.

Fabrizio Pivari

Image Crosspost plugin will crosspost (via email) every local image in a published post to the selected web services.
In detail: every time you publish a post, Image Crosspost extracts every local image (<img src=”http://www.local-site o absolute path) and using the alt and title description (or title of the post) will send an email to the supported web application with the images in the attach. From version 2.x the web applications supported are Flickr, Twitpic, Twitgoo, Twitrpix and img.ly. Post tags will become Flickr tags. You can set Flickr privacy uploading by email: Visible to friends, Visible to family, Visible to friends and family, Only visible to you, Visible to everyone.

Image Crosspost

Image Crossposting by email to Flickr, Twitpic, Twitgoo, Twitrpix, img.ly

Post Signature vs Image Crosspost