The OpenOffice product has been published under various licenses since it was first made available as open source in 2000. LGPLv3 was used for OpenOffice.org 3.0 beta through OpenOffice 3.4 beta. Currently Apache License 2.0 is used, since Apache OpenOffice 3.4.0.
A more detailed review of the history and pointers to current and historical licenses for OpenOffice code and documentation can be found here.
