QDuo

QDuo shows a ring or bar of buttons next to the cursor whenever you select text in any app. The actions are yours to define: prompts sent to a language model of your choice for translation, rewriting or explanation, web and dictionary searches, macOS's own on-device translation, read-aloud with word highlighting, and 22 local text transforms such as joining broken lines, changing case or formatting JSON. Results can stay in the popup, be shown as a diff, or replace the selection.

A screen-region shortcut runs OCR so text inside images can be acted on too, Shortcuts and shell scripts can serve as actions, and a local history keeps what each action produced. The README is primarily in Chinese with an English version; builds are published on GitHub for macOS 13 or later.