- Ken Jones' Avia Training 
- UK-based Graham Ellis of Well House Consultants 
- 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 
- Jonathon Bromley's company offers "Tcl 101"  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.