AtMonitor. Monitoring MiniTop - Displays top 3 most CPU hungry applications.
CPU - Supports multiple cores. Displays detailed process information and the top 3 CPU intensive processes. RAM - Shows memory specifications and the usage broken down into wired, used and free. It also tracks the top 3 memory hog processes and allows to "Purge" - recover memory (dev tools must be installed for the Purge feature to work). Broomstick. Mou - Markdown editor for web developers, on Mac OS X.