I was looking for something to enable me to examine an SQLite database, and came across the SQLite Database browser on SourceForge which is a GUI editor for SQLite databases, built on top of Qt.
http://sqlitebrowser.sourceforge.net/
http://sourceforge.net/projects/sqlitebrowser/
Although this project hasn’t been updated for a while, it seems to work OK, although I haven’t used it extensively.
Further investigation showed that there is a project on GitHub forked from the original SF project – SQLiteBrowser3 that appears to have been updated more recently.
https://github.com/rp-/sqlitebrowser
This version is improved from the original with a better User Interface and other features including syntax highlighting.