SlideScroll

SlideScroll is a scrolling window manager for macOS. Instead of tiling windows into smaller pieces, every window becomes a column on a horizontal strip that extends past the edges of the screen. Columns keep their width, new windows slide in beside the current one, and you move along the strip with a four-finger swipe or keyboard shortcuts. It supports stacks, tabbed columns, pinned columns, multiple displays and per-app floating. free and open source.