Allowing users to invite their contacts from other networks or e-mail providers is a popular method used in social networks & web applications.

OpenInviter is an open source PHP class, written in PHP5, for importing contacts from most of the well-known e-mail providers & social networks.

Such an invite feature is great, specially when presented as optional, to gain new users/visitors to any service.

There are already ready to use integrations for:

• WordPress
• Drupal
• Joomla
• phpBB & more.

OpenInviter supports:

• Gmail
• Windows Live
• Yahoo
• Mail.com
• Facebook
• Friendster
• hi5
• Linkedin
• Twitter
• Myspace & more..

FotoViewr is a web-based image gallery application which enables you to create 3D image galleries for your Flickr account.

You can choose to present your images from 6 different 3D gallery types.

Galleries can be created instantly by simply providing your Fickr username (no password required) and the applications lets you select which gallery to display.

After the Fickr gallery selection, FotoViewr provides you the embed code you need to insert into your webpage to display the gallery & that’s it.

Tip:

FotoViewr also has a Facebook application to use with Facebook galleries.

Tipmage is a JavaScript class for creating tooltips / notes over images similar to Facebook image tagging.

In order to create a tooltip, you simply double click any area on the image and the interface appears.

It works in 2 modes:

• Normal: which only shows the tooltip when hovered.
• Edit: which also allows you to edit the tooltip

Tipmage supports the use of special callback functions for editing of a tooltip (like Ajax calls to access a database) & the editing interface can be updated from a CSS file.

Dynamic form autocomplete code, named TextboxList, is built on Mootools javascript framework and works just like the Facebook form inputs that are very functional.

TextboxList works by caching all the results from a JSON Request and feeding them to the autocompleter object. When an item is added as a box, it’ removed from the feed array, and when the box is disposed it’s added back, so that it becomes available in the list when the user types.

This dynamic form autocomplete solution has a "without autocomplete" version that can be found here.