Quicksilver

Quicksilver is a macOS productivity application that focuses on quick access and automation. While it doesn't explicitly mention 'workflow observation' or 'pattern analysis' in the same AI-driven sense as Second Cursor, it does 'learn your habits' and allows for extensive 'task automation' through triggers and plugins. It offers 'macro recording' through its trigger system and allows for 'integration APIs' via its extensive plugin architecture. The 'contextual-inline-help' and 'non-intrusive-ui' are also present through its design philosophy of staying where you are and providing quick actions without disrupting workflow.