free office suite – the evolution of openoffice. compatible with microsoft .doc, .docx, .xls, .xlsx, .ppt, .pptx. updated regularly, community powered.

the official home page of the apache openoffice open source project, home of openoffice writer, calc, impress, draw and base.

quick tutorials, solutions and to the point.

github is where over 100 million developers shape the future of software, together. contribute to the open source community, manage your git repositories, review code like a pro, track bugs and features, power your ci/cd and devops workflows, and secure code before you commit it.

stack overflow is the largest, most trusted online community for developers to learn, share​ ​their programming ​knowledge, and build their careers.

sourceforge provides free & fast open source software downloads and development, and business software reviews and comparisons featuring the largest open source and business software directory.

q&a for ubuntu users and developers

linux and dev portal

ubuntubuzz.com is an unofficial ubuntu blog which provide daily news, application reviews, and tips and trick to be ubuntu holic.

collabora productivity, of course with collaboraonline, offers the most powerful cloud, mobile and desktop enterprise office suite. cross-device, fully open source, excellent interoperability