Microcal was one of the very first scripts I ever shared with the public. It was even commercial back in 2004 (I don’t remember the price but I think it was $5). I doubt I have sold more than 3-4 of it before I decided to give it out for free. Now, nearly 8 years later it still has several hundred downloads every month.
Just today I managed to check it and figured out how outdated the code was and how many PHP notices it produced. So here we are, fixed some bugs, improved the code a little bit and MicroCal is again usable in version 1.2 – also available as Google Code repository.