shadeBlue Software
Indigo Terminal Emulator
Terminal and communications software for Windows. Indigo connects over serial links and TCP/IP, including Telnet and SSH, and it can show received data as ASCII, decimal, hexadecimal, octal, binary, or a format you define.
This product has been discontinued and is no longer for sale. Version 3.0.162, released November 14, 2026, is the last published build and is free to download and use. (No license required)
What Indigo does
Indigo was built as a replacement for the Windows Telnet client and HyperTerminal. Sessions can stay open together, and the command tools cover the sequences you send again and again. Read the feature list.
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Serial and TCP/IP
Standard Edition uses RS-232 and TCP/IP. Professional Edition adds RS-422, RS-485, modem dial-up, UDP, and a TCP listener.
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Telnet, SSH, and raw data
Connect with Telnet, SSH1, SSH2, RSH, or RLOGIN, or watch a raw byte stream with no protocol at all.
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Many sessions at once
Each connection is a session window. Tile them, cascade them, or run more than one copy of Indigo.
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Data in the format you need
Show received bytes as ASCII, decimal, hexadecimal, octal, binary, or a display format you define.
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Commands you can reuse
Save macros, command libraries, and variables, or repeat a command list on a timer.
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Logs for every session
Each session keeps its own log, with size limits, rollover by size or date, and optional timestamps.
See details
A short look at the product
This video demonstrates just a few features that can be found in Indigo Terminal Emulator.
Version 3
Version 3 split the product into Standard and Professional, replaced the serial library, and added logging, file transfer, and modem dial-up. Existing Version 2 customers were eligible for a free upgrade to Version 3 Standard. Version 3 needs its own license key.
Published platform support
Indigo was published for these versions of Windows.
- Windows 10 (x86 and x64)
- Windows 8 (x86 and x64)
- Windows 7 (x86 and x64)
- Windows Vista (x86 and x64)
- Windows XP
- Windows Server 2012 (x86 and x64)
- Windows Server 2008 (x86 and x64)
- Windows Server 2003 (x86 and x64)
Please see the complete listing of supported versions here