AttachmentManager 3.1 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The most popular versions of the software 3.0 and 2.2.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. This program is an intellectual property of OutlookCloud. AttachmentManager lies within Communication Tools, more precisely E-mail Tools.
From the developer:
The Attachment Manager product is a small add-in program for Microsoft Outlook 2003, 2007 and 2010. It is based on a patent-pending technology which can transparently detach email attachments and embedded images, and store them in a Cloud, such as Amazon's S3 or Microsoft's Azure service. Alternatively, the attachments could also be stored within an Enterprise behind a firewall, for example, on a network attached drive.
You may want to check out more software, such as Kernel for Attachment Management, which might be related to AttachmentManager.