As longtime Mac Gems readers know, I rarely cover bundles or promotions--only when a particular sale offers readers a great deal on a number of great Mac apps.That's the case with the current ProductiveMacs bundle, which includes seven quality apps--five of them past Mac Gems, with another also earning a high Macworld rating--for just $30. Here's what three Hamiltons will get you:Default Folder X by St. Clair Software (normally $35): We haven't reviewed Default Folder in several version--we should remedy that--but earlier this year I explained why it's one of the apps I can't live without. I'll just quote myself from that article, and then let you read the rest of the article for the details: "Once you've used Default Folder X for a while, OS X's stock file-navigat