NetBots is a program that lets you initiate agents that go out and retrieve information for you at specified intervals. Pinging, fingering and port monitoring can all be automated.
According to the author: "Version 2.5 introduces the FTPBot, which lets users monitor FTP directories for updates. The FTPBot is a great way to check for new files in FTP dropboxes. The popular PingBot module has been revamped to be more compatible and flexible. Numerous new preferences like 'mute mode' and 'verbose logging' allow users to configure how NetBots reports errors. A host of additional features and bug fixes make NetBots 2.5 a more stable and useful application."
Can't find what you're looking for? Try a search:
Also, if you have an older Mac, be sure to check out the "Classic" applications page for more options.
Finally, take a look at ALEMIA if you think you know that name of an application, but aren't quite sure.
No, I don't accept reviews anymore for these older applications. With the creation of this page in the Orchard's late 2005 redesign, I only accept reviews for currently-developed applications that work on Mac OS X (or later....whatever that might be!!).