Amethyst vs Pinboard

Amethyst is a free, open-source tiling window manager for macOS inspired by xmonad. It automatically arranges application windows into non-overlapping layouts using keyboard shortcuts, without requiring System Integrity Protection to be disabled. Amethyst supports multiple layout algorithms including tall, wide, fullscreen, and column layouts.

Pinboard is No-frills bookmarking service with archiving, full-text search, and privacy focus.. It is available under a paid model. This tool falls under the productivity category.