Ilumi.dev is a hotkey-based desktop tool that provides easy access to LLM functions. It allows users to start an LLM query in any program using the selected text in that program with one shortcut key. The tool also incorporates private data sources for more tailored and comprehensive answers by adding a directory of PDF, DOCX, TXT files. The aim of the tool is to level the playing field on thinking power, allowing users to get answers faster and be more productive.