Too much to not mention: davidw, antirez, and Richard Hipp (SQLite) are all current or former heavy hitters in the Tcl world. David contributed to the second ed. of Tcl and the Tk Toolkit[0], co-authored Rivet[1] (an Apache httpd Tcl module), among other things. antirez wrote Tcl the Misunderstood[2] and Jim[3], a lighter weight Tcl implementation, and Richard (drh) is a former Tcl Core Team member[4] who describes SQLite as “a Tcl extension that escaped into the wild.”[5]