Go-oo

Go-oo (also Go-Open Office; previously called ooo-build) is a discontinued free office suite which started as a set of patches for OpenOffice.org, then later became an independent fork of OpenOffice.org with a number of enhancements, sponsored by Novell.
ooo-build was started in 2003. The go-oo.org domain name was being used by 2005. The first separate release of Go-oo was 2.3.0, in October 2007. Go-oo was discontinued in favour of LibreOffice in September 2010.
Go-oo had better support for the Microsoft Office OOXML file formats than OpenOffice.org, including write support, as well as other enhancements that had not been accepted upstream. Many free software advocates worried that Go-oo was a Novell effort to incorporate Microsoft technologies that might be vulnerable to patent claims, and that the effort legitimized OOXML which harmed actual document compatibility. The hybrid PDF export (PDF that includes original source documents), Sun Presentation Minimizer, and other functionalities were directly available in Go-oo. Later analysis of Novell's contract with Microsoft show that Go-oo feature compatibility was intentionally limited. LibreOffice in later distributions, like Debian Stretch, use Java instead of Mono (software).
The package branded "OpenOffice.org" in many popular Linux distributions was in fact Go-oo, not the upstream OpenOffice.org code.
History.
The ooo-build patchset was started at Ximian in 2003, before that company was bought by Novell. This was originally because Sun was slow to accept outside patches to OpenOffice.org, even from corporate partners. Most Linux distributions used ooo-build rather than OpenOffice.org upstream code directly.
Since the end of 2007, various Linux distributions, including SUSE in its various forms, Debian and Ubuntu, had cooperated in maintaining Go-oo as a large set of patches to the upstream OpenOffice.org that, for various technical or bureaucratic reasons, had not been accepted (or, in some cases, even submitted) upstream. Others also offered Windows builds based on Go-oo, "e.g." OxygenOffice Professional and OpenOffice.org Novell Edition.
Michael Meeks, from Novell (who also worked on OpenOffice.org and GNOME), said that the differentiation was done because Sun Microsystems wanted to preserve the right to sell the code on a proprietary basis, as they did for IBM Lotus Symphony. Sun was accused of not accepting contributions from the community. Go-oo encouraged outside contributions, with rules similar to those later adopted for LibreOffice.
In September 2010, The Document Foundation announced LibreOffice as a fully separate fork of OpenOffice.org. Go-oo was deprecated in favour of LibreOffice and Go-oo changes were incorporated into LibreOffice.
Versions.
Stable builds of Go-oo were usually available a couple of days after OpenOffice.org stable builds. Windows builds had a different last number in the version's number than Linux builds. A stable version for Macintosh computers was available.