From Apache OpenOffice Wiki

Have been dropped before Apache OpenOffice 3.4

All

In the About box (Help -> About OpenOffice.org) press Ctrl + S, D, T one after another (SDT stands for Star Division Team). The list of contributors scrolls in the dialog.

Writer

StarWriter Team

Enter the word "StarWriterTeam" into a Writer document, then press F3. The names and picture of the StarWriter developer team appears.

GoOO Team

Enter the word "GoOOTeam" into a Writer document, then press F3. The names and picture of the GoOO developer team appears. (Only in these versions: http://go-oo.org/download/)

Calc

The GAME() function

Putting =GAME() into any cell results the text "say what?" in that cell.

Frogger

Putting =GAME("Froggie") into any cell results the text "Froggie" in that cell. Putting =GAME("Froggie") into any other cell afterward results in the text "oh no, not again!"

Tic-Tac-Toe

Put the =GAME(A2:C4;"TicTacToe") formula into A1 and press ENTER. A version of the Tic-Tac-Toe game is playable.

Space Invaders

Put =GAME("StarWars") into any cell and press ENTER. A version of Space Invaders is playable. Although if you try to play it again, the message "oh no, not again" appears. To play again, you must fully close OpenOffice.org.

This easter egg has been removed since DEV300_m72 (which will become OO.org 3.3). This function now behaves the same as Froggie above.

Life, Universe and Everything

Put =ANTWORT("Das Leben, das Universum und der ganze Rest") into any cell and press ENTER. The result is the famous number 42 from the Hitchhiker's Guide to the Galaxy.

StarCalc team

Put =STARCALCTEAM() into any cell and press ENTER. The names and picture of the StarCalc developer team appears.

Random smileys

Put =TTT() into any cell and press ENTER. A random smiley appears. E.g. :-] ;-] B-) 8-}