Dejal has released Simon 3.6 with improved compatibility with OS X 10.9 Mavericks, plus new Notification Center and History plug-ins. Additionally, the system-monitoring tool brings a rewritten Twitter plug-in (along with a Twitter Update default notifier) that works with the latest Twitter API and uses Internet Accounts from System Preferences so you don’t need to enter your Twitter credentials in Simon. The update also adds support for escaping braces (curly brackets), square brackets, and custom date/time formats in report templates, adds a MySQL default service, and considers the check frequencies for successes and failures when calculating the Up Time percentages. A quick 3.6.1 release fixes a few minor bugs. ($49–$499 new, free update, 12 MB, release notes)
Mac OS X Zip Expanding Utility
Firefox (and possibly other applications) may ask you what you want to do with .zip archives that you download from the Internet. If you want to expand them with Mac OS X (rather than StuffIt Expander), you may be unsure of which application actually does the job. You're looking for Archive Utility (in Leopard and later) or BOMArchiveHelper (in Tiger). In either case, the application is stored in Hard Drive/System/Library/Core Services/. Don't move it from there, though, or you'll confuse matters.