didriksg / Crisp

Every display control macOS hides, in one menu bar app: sharp HiDPI/Retina scaling (no more blurry or tiny text), DDC brightness and volume, Extra Brightness past 100%, presets, virtual displays. Free and open source, a no-cost alternative to BetterDisplay and Lunar.

waydabber / BetterDisplay

Unlock your displays on your Mac. Flexible HiDPI scaling, XDR/HDR extra brightness, virtual screens, DDC control, image adjustments, PIP/streaming, EDID override. More info - betterdisplay.pro/guide

themix-project / themix-gui

Graphical application for generating different color variations of Oomox (Numix-based) theme (GTK2, GTK3, Cinnamon, GNOME, Openbox, Xfwm), Archdroid, Gnome-Color, Numix, Papirus and Suru++ icon themes. Have a hack for HiDPI in gtk2. Its Base16 plugin also allowing a lot of app themes support like Alacritty, Emacs, GTK4, KDE, VIM and many more.

Joowonoil / MacVirtualDisplay

Mac Virtual Display — Native 120Hz HiDPI virtual displays for Galaxy Z Fold, Galaxy Tab, and iPad Pro. Sunshine integration and safe layout restore for macOS.

fanckush / SoloDisplay

Turn your MacBook's internal display off while an external monitor is connected

Rydersel / Candela

Candela protects your displays from OLED burn-in and wear: panel health history, a checkup for defects, and the controls macOS leaves out for external monitors (brightness, volume, contrast, custom resolutions, HiDPI scaling). Free and open source.