Have been dropped before Apache OpenOffice 3.4
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.
Enter the word "StarWriterTeam" into a Writer document, then press F3. The names and picture of the StarWriter developer team appears.
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/)
The GAME() function
Putting =GAME() into any cell results the text "say what?" in that cell.
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!"
Put the =GAME(A2:C4;"TicTacToe") formula into A1 and press ENTER. A version of the Tic-Tac-Toe game is playable.
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.
Put =STARCALCTEAM() into any cell and press ENTER. The names and picture of the StarCalc developer team appears.
Put =TTT() into any cell and press ENTER. A random smiley appears. E.g. :-] ;-] B-) 8-}