Fax4Word
Fax4Word is a powerful Fax/Mail merge software that works as an MS Word addin and equips MS Word with a powerful functionality. Fax4Word uses the powerful Windows Fax and users can send faxes easily through MS Word by specifying the recipient and phone number straight through the document and... Fax4Word has a powerful Fax Merge feature which allows users to send personalized faxes to multiple recipients automatically thus making Fax4Word an ideal tool for marketers and professionals that need to send the same fax to many recipients on a frequent basis.
http://www.addins4office.com/fax4word/files/Fax4Word.exe - 484Kb - Download - Screenshot

ClickFax Pro
ClickFax Pro allows you to send and receive faxes over the Internet. Received faxes are delivered to your email as a PDF file. Requires only an Internet connection - no need for a fax modem, fax machine, phone line or fax server! ClickFax Pro allows you to fax individual files, print files to a... Also allows for mass faxing mail merges from Word. ... clickfaxpro. ... com and make 3 free live faxes. ... Integrates in real-time with many contact databases like Outlook, Exchange, ACT! ... , QuickBooks, and many others.
http://www.datafabrication.com/downloads/cfpro_setup.exe - 4Mb - Download - Screenshot

Word PhoneBook
Word PhoneBook 3. 3 [ASP] - Word PhoneBook is an Add-In for Microsoft Word for Windows 95,97 and 2000. It is a database of names, addresses and fax numbers that automates the process of writing letters, faxes and envelopes under Word. The approach is different to other similar utilities in that... Finally it has the option to extract from the database selected records and create a Mail Merge data document. ... The commercial version works exactly as the freeware version, except that there are no limits to the size of the addresses database (limited to 50 records on the free version).
http://www.momsoftco.com/zip/phonbk.zip - 951Kb - Download - Screenshot

GFI FAXmaker for Exchange/SMTP
Fax-enable your network users with GFI FAXmaker, the leading fax server for Exchange Server, Lotus and SMTP/POP3 servers. Without installing additional client software, users can send and receive faxes directly from Outlook or any other email clients. ... GFI FAXmaker for Exchange/SMTP features include a multi-line fax server, fax antispam, inbound fax routing, print to fax driver for Windows, support for server-based rendering of Office documents, Word mail merge support, allowing users to create personalized fax mailings, fax management features and more.
http://software.gfi.com/faxmaker12.exe - 13Mb - Download - Screenshot