All archive files directly on this page are his original alpha/beta releases. The main distribution point is here.
Archives with no such suffix are released versions of obTcl. Releases are announced on comp.lang.tcl.announce.
If you use obTcl, please drop him an e-mail (he will then be able to give warnings on any major changes due, and you'll have as say)!
Subdirectories in here contain my own unofficial changes to obTcl. These are transient and reflect changes I am feeding back to Patrik. That means that the latest snapshot of obTcl usually contains all my patches.