AwayFind lets you mark certain contacts or message topics as ‘Urgent’ and then alerts you via phone, SMS or IM when relevant messages arrive.

Kwaga displays social network profiles and lists recent email exchanges with people you correspond with.

Gist brings together information from across the web about people you’re corresponding with, providing rich person and company profiles, news and updates.

Pixetell detects email links to video messages created with Pixetell’s video software and lets you preview, comment on, and share those videos without leaving your inbox.

Smartsheet lets you access and update entries in Smartsheet’s sales pipeline and project management tool.

Xobni, Rapportive, Manymoon, Newmind Group, and BillFLO have also launched their own contextual gadget integrations.

Starting today, third party developers can build Gmail contextual gadgets and distribute them in the Google Apps Marketplace. These gadgets can display information from social networks, business services, web applications and other systems, and users can interact with that data right within Gmail. Contextual gadgets are yet another example how the power of the web can outpace traditional business technology Several new contextual gadget integrations for Gmail are available to Google Apps customers in the Apps Marketplace today:Like any other application in the Google Apps Marketplace, a Google Apps domain administrator can install a contextual gadget from the Marketplace with just a few clicks. Both before and during the install process, administrators can review the portions of an email the gadget will have access to, and can revoke that permission at any time from their control panel. For more information on the Google Apps marketplace, watch the overview video