tkalc is a pocket calculator for developers and IP network operators. Arbitrary arithmetic or logical expressions can be entered very quickly in a text entry field. The result is then simultaneously displayed in decimal, hexadecimal, octal, binary, ASCII, IP address, and Boolean format. It accepts all number formats, operators, and functions that can be handled by the Tcl interpreter and extends this even further for input of IP addresses and binary numbers.
tkbiff allows arbitrary commands to be executed upon mail reception. If you like programs such as xbiff and xbiff++ but wish they were more flexible, then you'll like tkbiff. Unlike other biffs, tkbiff is fully customizable. tkbiff also doesn't waste your valuable screen space with icons; instead, it shows you the mail itself. It supports UNIX, Mac, and Windows, IMAP, POP, and UNIX-style mail files, and SSL and APOP.
TkDesk is a graphical file manager for Unix and the X Window System. It offers a very rich set of file operations and services, and provides the user with an immense amount of configurability. Its configuration flexibility results from the use of Tcl/Tk as the primary implementation language. Another benefit of using Tcl/Tk is that TkDesk is very portable and runs on virtually any Unix platform.
TkDVI is a DVI previewer built with the Tcl/Tk toolkit. It can use multiple windows to display multiple pages at the same time (which can come from multiple DVI files sharing a common font repository). Each window can show either a single page, two facing pages (as in a book) or sixteen reduced pages in the space of one, to check page breaks and positioning of floating items. TkDVI supports many features from xdvi, such as a magnification glass, but also adds interesting stuff like a gv-like page selector and a `rubber line' for measuring distances. TkDVI is based on a reusable Tk `image type' for DVI files which can easily be incorporated in other programs, and it is straightforward to customize and extend TkDVI itself.
TkRat is a graphical Mail User Agent (MUA) which handles MIME. It is mainly written in C, but the user interface is done in Tcl/Tk. The program currently understands UNIX mailboxes, POP, IMAP, and mh folders. Messages are sent via SMTP or any user configured program (sendmail, for example). It has support for disconnected IMAP operations.
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.