WhoLinked shows the sites linking to you in real-time. Simple widget or pluggins for WordPress, Blogger, TypePad, etc.

3jam recently released a new widget which lets your web visitors send you a mobile text message without revealing your phone number. You can also reply to the original text message and the conversation continues as long as you want.

The widget is receiving lots of interest from MySpace and other social network users.

A pretty cool service.

Embeddable Flash based widget to display your LinkedIn profile.

Adding the Criteo AutoRoll widget to your blog will display links to other blogs your readers should like. Kind of like how Google Adsense works, but displays links to relevant blogs instead of advertising. AutoRoll requires sign-up and simple size/color configuration.

Criteo gets my vote for simply being based in Paris, France. J’aime Paris.

Discover people and places nearby while broadcasting your current geographic location with Plazes.

As your computer moves locations, IP address changes are detected with a small app you install. When a change occurs the app prompts you to supply location information including address and description.

There’s also a small app you can install on some cell phones to automatically detect your location. I could see this being very useful.

You can SMS in your location as well.

The Plazes widget works with myspace, friendster, TagWorld and any other community that allows you to embed Flash.

Build a community of readers around your blog with MyBlogLog. Premium service includes a stats package. Display a widget on your site to show recent visits by MyBlogLog community members.

Add a Meetup badge to your blog or website. Several different formats and content options available including showing the Meetup Groups you belong to, Meetups by topic or Meetups by City. Mostly blog/website focused delivery as myspace is only supported for the Membership Badge.