RealTerm has been created mostly to represent a better alternative to the ubiquitous HyperTerminal application, especially when it comes to debugging microcontrollers. It allows capturing, controlling and debugging binary data as well as other types of data streams.
The most impressive part of this application for me is the fact that it can emulate almost any kind of terminal used for serial communication. It’s a very complex, feature-rich and comprehensive application that offers a huge number of settings, options and functions. Anyway, it doesn’t support only physical serial communication ports but also Telnet, TCP, and other protocols.
I also like a lot its handy right click context menu and the fact that the popup hints (the mouse-over tooltips) provide clear and comprehensive explanations. Furthermore, RealTerm comes with a directory containing example files that allow seeing how RealTerm works and how it can be used in conjunction with various types of scripts and other programs.
In an end note, RealTerm is one of the most comprehensive and effective terminal applications for Windows serial communications. Simply put, the fact that it is also open-source makes me recommend it with all my heart.