As much as people wonder “who still uses Tcl?” or “what the heck is Tcl?” … it’s still alive and well and under steady new development. The long-awaited release of Tcl 8.5 happened this past December 20, 2007. You can download it from here.
The discussion on Slashdot about it shows that there’s still a lot of misinformation and outright FUD being spread about Tcl, now 20 years old. Of course, the Tcl community seems to focus more on excellence in engineering than evangelism and PR, so Tcl will likely remain “a well-kept secret, sitting out in plain sight” for the next 20 years.
For people who are already familiar with Tcl but would like to know what significant changes were introduced in Tcl 8.5, Michael Cleverly has a fantastic write-up on it. I highly recommend reading what he wrote if you’re looking to take advantage of Tcl 8.5’s new features.