Sscom (also known as "UartAssist" in some circles) is a high-performance serial COM port debugging assistant primarily developed in East Asia but used globally. is widely regarded as one of the most stable, feature-complete releases. The English variant removes language barriers, making all menus, dialogues, and help files accessible to an international audience.
Hitachi Information Systems, Ltd. (and various community-maintained versions). Sscom V5.13.1 English