IO Ninja is an all-in-one scriptable terminal, sniffer and monitor. It's aimed at system administrators, network security experts and developers of communication software. IO Ninja is free for non-commercial usage.

Out-of-the-box IO Ninja provides:
* Serial terminal
* TCP terminal (client/server)
* UDP terminal (client/server; UDP broadcast support)
* SSH terminal
* TCP proxy (man-in-the-middle-style monitoring)
* Windows named pipe terminal (client/server)
* Serial monitor
* Network sniffer
* Windows named pipe monitor

The latest version of IO Ninja has excellent support for binary data -- both editing binary packets before sending as well as displaying both incoming and outgouing (RX/TX) binary data in a communication log:
* Text editor with support for escape sequences (\n, \xFF, \u2661 etc)
* Modern hex editor with support for all UTF encodings
* Template packet editor -- define a packet structure in C-language and then edit the fields with property grid
* Binary data is interleaved with informational textual messages thus providing a clean single-sheet log
* Display binary data as hex-view or plain text, merge incoming packets together, etc
* Multiple modes of binary data copy (copy-as-text, copy-as-hex, copy-as-C-array, save-as-file etc)

IO Ninja features Session Linking which turns it to a universal redirector. Create two sessions (e.g. Serial and TCP), configure them and then link them together. All the data will be passed-through from one end to another and vice versa.

IO Ninja is programmable with Jancy language and it turns IO Ninja into a universal IO debugger. With scripting you can:
* Modify any standard session
* Write custom protocol analyzers and syntax highlighters
* Write testing utilities (e.g. wait for incoming packets, analyze, send something in return)

IO Ninja has an IDE to assist you in exploring and making use of IO Ninja scripting.