LibreOffice in the context of OpenOffice.org Writer

ReactOS is a free and open-source operating system for i586/amd64 personal computers that is intended to be binary-compatible with computer programs and device drivers developed for Windows Server 2003 and later versions of Microsoft Windows. ReactOS has been noted as a potential open-source drop-in replacement for Windows and has been of interest for its information on undocumented Windows APIs.

ReactOS has been in development since 1996. As of October 2025, it is still considered to be feature-incomplete alpha software. Therefore, it is recommended by the developers to be used only for evaluation and testing purposes. However, many Windows applications are working, such as Adobe Reader 9.3, GIMP 2.6, and LibreOffice 5.4.

Orca is a free and open-source, flexible, extensible screen reader from the GNOME project for individuals who are blind or visually impaired. Using various combinations of speech synthesis and braille, Orca helps provide access to applications and toolkits that support AT-SPI (e.g., the GNOME desktop, Mozilla Firefox/Thunderbird, OpenOffice.org/LibreOffice and GTK, Qt and Java Swing/SWT applications).

The name "Orca", which is another term for a killer whale, is a nod to the long-standing tradition of naming screen readers after aquatic creatures, including the Assistive Technology product on Windows called JAWS (which stands for Job Access With Speech), the early DOS screen reader called Flipper, and the UK vision impairment company Dolphin Computer Access.

In computing, a presentation program (also called presentation software) is a software package used to display information in the form of a slide show. It has three major functions:

• an editor that allows text to be inserted and formatted
• a method for inserting and manipulating graphic images and media clips
• a slide-show system to display the content

Presentation software can be viewed as enabling a functionally-specific category of electronic media, with its own distinct culture and practices as compared to traditional presentation media (such as blackboards, whiteboards and flip charts).

The Open Document Format for Office Applications (ODF), also known as OpenDocument, standardized as ISO 26300, is an open file format for word processing documents, spreadsheets, presentations and graphics and using ZIP-compressed XML files. It was developed with the aim of providing an open, XML-based file format specification for office applications.

The standard is developed and maintained by a technical committee in the Organization for the Advancement of Structured Information Standards (OASIS) consortium. It was based on the Sun Microsystems specification for OpenOffice.org XML, the default format for OpenOffice.org and LibreOffice. It was originally developed for StarOffice "to provide an open standard for office documents."

Liberation is the collective name of four TrueType font families: Liberation Sans, Liberation Sans Narrow, Liberation Serif, and Liberation Mono. These fonts are metrically compatible with the most popular fonts on the Microsoft Windows operating system and the Microsoft Office software package (Monotype Corporation's Arial, Arial Narrow, Times New Roman and Courier New, respectively), for which Liberation is intended as a free substitute. The fonts are default in LibreOffice.

The Mozilla Public License (MPL) is a free and open-source weak copyleft license for most Mozilla Foundation software such as Firefox and Thunderbird. The MPL is developed and maintained by Mozilla, which seeks to balance the concerns of both open-source and proprietary developers. It is distinguished from others as a middle ground between the permissive software BSD-style licenses and the GNU General Public License. As such, it allows the integration of MPL-licensed code into proprietary codebases, as long as the MPL-licensed components remain accessible under the terms of the MPL.

MPL has been used by others, such as Adobe to license their Flex product line, and The Document Foundation to license LibreOffice 4.0 (also on LGPL 3+). Version 1.1 was adapted by several projects to form derivative licenses like Sun Microsystems' Common Development and Distribution License. It has undergone two revisions: the minor update 1.1, and a major update version 2.0 nearing the goals of greater simplicity and better compatibility with other licenses.

Open-source software development (OSSD) is the process by which open-source software, or similar software whose source code is publicly available, is developed by an open-source software project. These are software products available with its source code under an open-source license to study, change, and improve its design. Examples of some popular open-source software products are Mozilla Firefox, Google Chromium, Android, LibreOffice and the VLC media player.

The Finnish identity card (Finnish: henkilökortti; Swedish: identitetskort) is one of two official identity documents in Finland, the other being the Finnish passport. Any citizen or resident can get an identification card. Finnish citizens will get indication of citizenship on the card. It is available as an electronic ID card (Finnish: sähköinen henkilökortti; Swedish: elektroniskt identitetskort), which enables logging into certain services on the Internet, local computers or adding digital signatures into LibreOffice ODF documents or creating DigiDoc formatted containers that also allows encryption during content transfer. ID card is applied at a police station and it is issued by the police.

Possession of an ID card or any ID document is non-compulsory in Finland, though interactions with officials and companies, like voting, picking up a parcel from Posti offices or buying alcohol when a salesperson suspects buyer to be under 18 or 30 years old, can be difficult or impossible without an ID card, a passport or a driving licence.

LibreOffice Writer is the free and open-source word processor and desktop publishing component of the LibreOffice suite and is a fork of OpenOffice.org Writer. Writer is a word processor similar to Microsoft Word and Corel's WordPerfect with many similar features, and file format compatibility.

LibreOffice Writer is released under the Mozilla Public License v2.0.