| google-diff-match-patch | Diff, Match and Patch libraries for Plain Text | Text | Apache2.0 | |
| KCodecs | Text encoding | Text | LGPLv2.1+ | |
| KCompletion | Text completion helpers and widgets | Text, Widgets | LGPLv2.1+ | |
| KCoreAddons | Addons to QtCore | Text, Data | LGPLv2.1+ | |
| KDocTools | Documentation generation from docbook | Development, Text | LGPLv2.1+ | |
| KI18n | Advanced internationalization framework | Development, Text | LGPLv2.1+ | |
| KTextEditor | Advanced embeddable text editor | Text, Widgets | LGPLv2.1+ | |
| KTextWidgets | Advanced text editing widgets | Text, Widgets | LGPLv2.1+ | |
| Novile | Source code editor component for Qt | Development, Text | GPL | |
| QMarkdownTextEdit | C++ Qt QPlainTextEdit widget with markdown highlighting and some other goodies. | Text | MIT | |
| QScintilla | Qt port of Scintilla C++ editor control | Text | GPLv2, GPLv3, Commercial | |
| Sonnet | Support for spellchecking | Text | LGPLv2.1+ | |
| Syntax Highlighting | Syntax Highlighting | Text | LGPLv2.1+ |