Old Stuff
I have a number of projects that are no longer active, mostly because they have been superseded by newer, better stuff. The biggest of these is CiviNode, a Drupal 5/CiviCRM 1.x specific solution for pulling CiviCRM content into Drupal.
CiviCRM 2.x has APIs that differ a lot from 1.x, which broke CiviNode. And since the biggest elements used to pull content in -- Views and CCK -- also changed their APIs very extensively going from Drupal 5 to Drupal 6, it was too much work to do on a module that I haven't been using much in my consulting business. Since Lobo et al have done a great job implementing Views (and I believe also CCK) support in CiviCRM 2.x, CiviNode has done its job. There are better and better supported solutions now, and I recommend using them.
Date handling, the other area, has gotten a lot of attention from Karen Stevenson, who understands the issues I was concerned about. In general, I recommend that anyone who wants to do dates "right" use her Date module, which is good enough for almost any purpose you'd want. While Drupal core still has problems, Karen's module gets around them. By using her API whenever possible, you're modules will do the right thing as well.