Tepl is a library that eases the development of GtkSourceView-based text editors and IDEs. Tepl is the acronym for "Text editor product line". It serves as an incubator for GtkSourceView. Tepl was previously named Gtef (GTK+ text editor framework). The project has been renamed in June 2017 to have a more beautiful name. The end of Tepl is pronounced like in "apple".