I’ve been a huge fan of Calypso, an email program that’s simple, highly fiddle-able, and small. Unfortunately its producers, MCS of Dallas, dropped it a few years back leaving a lot of users in the lurch. I’m still using it, however, despite its quirks under Windows XP, and am very glad to see that another company, Rose City Software, has reintroduced it as Courier 3.5. They promise new features — like “Color Markers” to help organize messages — and a cheap upgrade for Calypso users ($20 against $30 for the full thing.)I’ve yet to try it out yet, but I’m glad to see that software as good as Calypso doesn’t always just die off. I’ll review Courier in a future posting.