Most sunset filters only warm the screen. Iris also goes below the hardware brightness floor, removes flicker and schedules breaks, which is the part that actually helps after eight hours in front of a monitor.

f.lux is the tool that started this category: give it a location and the screen follows a sunrise and sunset curve, standard colour at noon, gently warm after dusk and deeper late at night, with finer control, time based curves and per-application exemptions.

Where top hands you a wall of monochrome numbers, htop draws a dashboard: one coloured bar per core, memory and swap in plain view, and a process list that scrolls and takes clicks. Killing or reprioritising a process no longer requires its number, and the whole thing stays under two hundred kilobytes.

Advanced Renamer 4.25 renames files and folders in batches on Windows and macOS, pulling name parts from photo EXIF, music ID3 tags and video properties; private use costs nothing.

AppCleaner 3.6.8 is a free macOS removal utility: drop an application onto its window, it looks for the related files, one button clears them. Builds still cover systems from Mojave back to Snow Leopard.

A cleaner that has been at this for more than twenty years: temporary files, logs, thumbnails and browser traces out, startup entries and leftover uninstall debris managed. The free tier covers cleaning, privacy and startup control; the paid tier adds automation.

An Android file manager that puts local storage, shared folders on the same network, remote servers reached over file transfer protocols and several cloud accounts behind a single entry point, with a text editor and archive handling included.

A paid maintenance suite for macOS that gathers cache and log cleanup, malware removal, privacy cleaning, application uninstalling, startup management and a visual map of disk usage behind one window.