Interfolio is a credentials and dossier management company that allows academic job seekers to request letters of recommendation online, just once, and send them to as many job applications as they see fit.

This company can send documents by paper, email and directly to online applications themselves.

Interfolio also has a service for search committees to manage faculty and fellowship searches online.

Sources:

• http://chronicle.com/blogs/profhacker/using-interfolio-to-manage-your-professional-documents/24094
• http://tanyaroth.wordpress.com/2010/10/21/the-job-applicant/
• http://soupofmedia.com/2009/10/12/ask-for-recommendations-the-painless-way/
• http://www.academicsandbox.com/blog/?p=292