Over the last couple of releases, KOffice/Calligra has changed its organization considerably. To start, as part of the fork, most of the old names starting with K have been thrown out. KWord, for example, is now simply Words, whereas KSpread is Sheets and KPresenter Stage. The 2.4 release continues this straightforward naming, with Braindump for whiteboards and Flow for flow charts. Only Karbon and Krita, the graphics editors, and Kexi, the database manager, retain their original names, presumably because they are well-known as standalone applications.
Additionally, Calligra has been moving toward a common interface. Of its nine applications, only Krita and Kexi depart from this common interface to any extent, and even they have obvious features in common.