I've written my first
search plugin on MyCroft, for the excellent
SuperTool. I can't believe that out of 22,000 plugins, mine is the first for such a brilliant tool. Take a look and try it out - you won't regret it. Better than a lot of pay-for ones, in my view, but there's a special place in my heart for the free, oddly named and somewhat spartan
dnscolos. My web hosts often use
intoDNS which I rather like as well, and gets new tests and features periodically.
(How do I manage to sound like I'm advertising, even when I've nothing to gain? Must be that boundless enthusiasm...)