DB Browser for SQLite
sqlitebrowser.org
A simple, focused GUI for creating, browsing, and editing SQLite database files — the format used by Django, mobile apps, and embedded systems.
Why it is useful
SQLite files are everywhere but not human-readable on their own. This tool gives a spreadsheet-like view of tables and a query editor, without the overhead of a full multi-database GUI when all you need is to inspect one .db file.