Triangle II has an average user rating of 4.46 from 26 reviews
Latest 26 reviews from a total of 26
It seems to be definitively abandoned by Cakewalk. The question has been asked a few months ago in the Cakewalk forum and Cakewalk never answered.
But you can download it here (legally) in the web history (use the link "Download it today" at the top of the rightmost column of the page):
The link works perfect, I've just tried it again for you a minute ago.
It can also be downloaded passing by Pluginboutique (an excellent website, I like it a lot):
For their other freeware (Square I) it is the same punishment: too old for the taste of Gibson (the new owner of Cakewalk), so it went to the dustbin as well. But the problem is that the download file for "Square I" has never been kept by the history (the Wayback Machine). And it is not available at Pluginboutique either. Conclusion: this one is lost for the eternity...