See the categories for the specific modules (typically: word processor, presentation program, spreadsheet, and sometimes more)

iWork 2008 (Apple)

Apple’s Office suite. Includes Keynote, Pages, and Numbers.

KOffice 1.6.3 (The KOffice Project)

Microsoft Office 11.5 (2004); 12.1.1 (2008)

NeoOffice 2.2.4 patch 2 (Planamesa Software)

OpenOffice 2.4.1 / 3.0 beta 2 (OpenOffice.org)

3.0 beta is a native OSX version!

OpenOSX Office 2.0 (OpenOSX)

Based on the GNOME desktop environment. Includes AbiWord 2.4.6, Gnumeric 1.7.11, Diagram 0.96.1, and (optional) Gimp 2.2.17.

For more information on the components and the current (non-ported versions) see: AbiSource, Gnumeric.org, Gimp.org.

Papyrus Office 12.5 (ROM Logicware)

RagTime X 6.0 (B & E Software / ComGrafix)

ThinkFree Office 3.2 (ThinkFree)