- Ken Jones' Avia Training [1]
- UK-based Graham Ellis of Well House Consultants [2]
- Phaseit emphasizes Expect and network management, along with more general application development
- Lindsay Marshall trains
- Zveno runs many courses each year
- Clif Flynt's Noumena [3]
- http://www.esperan.com
- Jonathon Bromley's company offers "Tcl 101" [4] specifically aimed at [IC] designers
- David Welton can do training in English and Italian.
One of the principal benefits of the Tcl Conferences is the top-flight training sessions traditionally offered as prologue (typically Monday and Tuesday) to the other sessions.