There are 4 repositories under kwin topic.
KDE Plasma add-on, that tiles your windows automatically and lets you manage them via keyboard, similarly to i3, Sway or dwm.
Autotile manager for Plasma 6
A kwin script that automatically tiles windows
Linux auto tiling manager with hot corner support for Openbox, Fluxbox, IceWM, Xfwm, KWin, Marco, Muffin, Mutter and other EWMH compliant window managers using the X11 window system. Therefore, this project provides dynamic tiling for XFCE, LXDE, LXQt, KDE and GNOME (Mate, Deepin, Cinnamon, Budgie) based desktop environments.
archived - X11 full-screen unredirection and lots'a settings for KWin
KDE KWin Script for snapping windows into zones
Fork of the KWin Blur effect for KDE Plasma 6 with additional features (including force blur) and bug fixes
KWin script for KDE Plasma which suggests other window thumbnails on snap
How to set up your nested Wayland Desktop Environment with systemd-nspawn container, like VirtualBox
Spacer with Mouse gestures for the KDE Plasma Panel featuring Latte Dock/Gnome/Unity drag window gesture. Run any shortcut, command, application or URL/file with up to ten configurable mouse actions.
KWin scripts controlling window placement on multi-monitor setups
Window styles for KDE Plasma highlighting the active window in the color scheme's accent color
A collection of handy-dandy tips, tricks and How-to(s)
KWin script that moves fullscreened window to a new virtual desktop
Qt implementation of Dual Kawase Blur using OpenGL
Autotile script for kwin
Desktop effect for KDE Plasma to apply GLSL shaders. Alternative to vkBasalt or ReShade when they are unsupported.
Notify the System76 Scheduler which app has focus so it can be prioritized
KWin scripts to control window geometry via keyboard shortcuts
KWin script to prevent windows from overlapping
KWin script to raise all windows of an application as a group
A template kwinscript for typescript
Polybar script/module for KDE virtual desktops
KWin script to add space around maximized windows.
Use KDE 5.27+ Tilling manager and "tile" all window at the best positon without having to press the shift key