Findings:
- Nexus: TK
- Tk Nova (user)
- tks (user)
- TK 23 (user)
- TK Jennings (user)
- tkk (user)
- Tcl
- TK (user)
- perl/tk
- Tk
- .tk
- tcl (user)
- SoLISP == TCL
- incr tcl
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