Licensing
OpenOffice.org was originally released by Sun under both the LGPL and SISSL; it is now released solely under the LGPL. However, OpenOffice.org requires a copyright assignment for contributions to the main code base; this allows Sun to create proprietary versions of the software (notably StarOffice). NeoOffice chooses not to assign its code to Sun; this prevents NeoOffice code from being used in official OpenOffice.org versions. Instead, NeoOffice is released only under the GPL (this is allowed by the LGPL), which ensures that any software based on it remains free.
There were initially some attempts to resolve the licensing differences and foster more direct cooperation and code-sharing between the NeoOffice and OpenOffice.org developers. However, the NeoOffice developers have stated that they prefer to work separately from OpenOffice.org because "coordination requires a significant amount of time"; on the other side, the OpenOffice.org developers state: "A proposal to work together has been made, and NeoOffice developers refused".
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