TkUsr is a small program that allows you to manage the Self-mode of USR/3Com Message/Professional modems. You can use it to retrieve voice messages and faxes. It features smart retrieving with a cache system, so you do not have to download the whole memory when you only want a single fax.
TkScanFax is a TCL/Tk GUI fax program in ANSI C/POSIX with support for efax and multiple languages. It helps make the cover page, convert text files, PostScript files, and image files into fax files, and send faxes. It also uses scanners by using backends such as SANE. The efax program supports Class-1 faxmodems.
YaaCs (Yet Another Advanced Cati system) is written in Tcl/Tk to manage and realize computer assisted telephone interviewing (CATI) and telemarketing. It make easy monitoring survey progress (giving several information), and it allows the management of the the survey with several administration tools. It simplifies the interviewer's work reading all contact's data from an easy and functional GUI. It can send faxes via hylaFAX and save all contact's data in a PostgreSQL database.
TKFaxSpool is a frontend for mgetty's "faxspool/faxq/faxrm" send FAX programs. It allows you to send facsimiles and manipulate the fax queue, maintain an Address Book of FAX recipients, and view PostScript attachments using GV. It has a special commandline argument for lpd-style FAX-printer spooling so any program with a print button can FAX the print output, and also allows you to view incoming FAX/Voice messages by quick launch button for TKVOICE.