Close to stable, but users are advised to be cautious and test thoroughly.
Facebook SDK / MarkupFacebookSDK +2
A simple markup module to include the Facebook SDK as per the asynchronous method. It will catch any calls to /channel.html, allowing easy setup optimised for cross domain issues on IE. By ffub
Fieldtype Select Relation / FieldtypeSelectRelation +2
This Fieldtype creates a select list (drop down) in relation to another field (you can restrict the list by setting up certain templates and / or pages). By justb3a