The news announcement describes the software project as, "Calligra is an integrated suite of applications that cover office, creative and management needs. It's the most comprehensive free suite of applications anywhere and we expect the number of applications to grow as the project matures. Calligra offers its applications on both desktop computers and mobile platforms like tablets and smartphones."
Calligra 2.4 is composed of Calligra Words (a word processor), Calligra Sheets (a spreadsheet program), Calligra Stage (a presentation program), Calligra Flow (diagrams and flowcharts), Kexi (visual database creator), and Braindump (note taking). Outside of these office applications, also making up Calligra is Krita (drawing) and Karbon (vector graphics) for graphics programs already known to KDE users. There's also a Calligra Plan program for project management.
This first release is shipping with two mobile flavors: a Calligra Mobile user-interface targeting the defunct Nokia N900 smart-phone and as Calligra Active, which is designed for the Plasma Active tablet environments.
For more details on Calligra 2.4, visit Calligra.org.