latex is a high-quality typesetting system; it includes features designed for the production of technical and scientific documentation.

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

since 1983, developing the free unix style operating system gnu, so that computer users can have the freedom to share and improve the software they use.

gimp - the gnu image manipulation program: the free and open source image editor

inkscape is professional quality vector graphics software which runs on linux, mac os x and windows desktop computers.

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.