Adobe Acrobat is a family of application software and Web services developed by Adobe Systems to view, create,
manipulate, print and manage files in Portable Document Format (PDF).
The family comprises Acrobat Reader (formerly Reader), Acrobat (formerly Exchange) and Acrobat.com. The basic Acrobat
Reader, available for several desktop and mobile platforms, is freeware; it supports viewing, printing and annotating of PDF
files. Additional, "Premium", services are available for reader on paid subscription. The commercial proprietary Acrobat,
available for Microsoft Windows and macOS only, can also create, edit, convert, digitally sign, encrypt, export and publish PDF
files. Acrobat.com complements the family with a variety of enterprise content management and file hosting services.
Apache OpenOffice (AOO) is an open-source office productivity software suite. It is one of the successor projects of
OpenOffice.org and the designated successor of IBM Lotus Symphony. Apache OpenOffice is a close cousin of LibreOffice and
NeoOffice. It contains a word processor (Writer), a spreadsheet (Calc), a presentation application (Impress), a drawing
application (Draw), a formula editor (Math), and a database management application (Base).
Apache OpenOffice's default file format is the OpenDocument Format (ODF), an ISO/IEC standard. It can also read and
write a wide variety of other file formats, with particular attention to those from Microsoft Office (although unlike
LibreOffice, it cannot save Microsoft's newer XML formats like DOCX, only import them).
Apache OpenOffice is developed for Linux, macOS and Windows, with ports to other operating systems. It is distributed
under the Apache License. The first release was version 3.4.0, on 8 May 2012.
In August 2015 the project reported a lack of active developers and code contributions. After ongoing problems with
unfixed security vulnerabilities through 2015 and 2016, in September 2016 the project started discussions on possibly
retiring AOO. The current version, 4.1.3, is known to include undisclosed security issues.
Despite the problems with development, the software continues to attract a large number of downloads, approximately
100,000 per day, a similar number to that of LibreOffice.
are a word processor, a spreadsheet and
a presentation program respectively, all part of a free, web-based software office suite offered by Google within
its Google Drive service.
The suite allows users to create and edit documents online while collaborating with other users in real-time.
LibreOffice is a free and open source office suite, a project of The Document Foundation. It was forked from
OpenOffice.org in 2010, which was an open-sourced version of the earlier StarOffice. The LibreOffice suite comprises programs
for word processing, the creation and editing of spreadsheets, slideshows, diagrams and drawings, working with databases, and
composing mathematical formulae. It is available in 110 languages.
LibreOffice uses the international ISO/IEC standard OpenDocument file format (ODF) as its native format to save
documents for all of its applications. LibreOffice also supports the file formats of most other major office suites, including
Microsoft Office, through a variety of import/export filters.
LibreOffice is available for a variety of computing platforms, including Microsoft Windows, macOS (10.8 or newer),
and Linux (including a LibreOffice Viewer for Android), as well as in the form of an online office suite. It is the
default office suite of most popular Linux distributions. It is the most actively developed free and
open-source office suite, with approximately 50 times the development activity of Apache OpenOffice, the other major descendant
The project was announced and a beta released on 28 September 2010. Between August 2011 (the first stable release) and
October 2011, LibreOffice was downloaded approximately 7.5 million times. The project claims 120 million unique downloading
addresses from May 2011 to May 2015, excluding Linux distributions, with 55 million of those being from May 2014 to May
Notepad++ is a text editor and source code editor for use with Microsoft Windows. It supports tabbed editing, which
allows working with multiple open files in a single window. The project's name comes from the C increment operator.
Notepad++ is distributed as free software. At first the project was hosted on SourceForge.net, from where it has been
downloaded over 28 million times, and twice won the SourceForge Community Choice Award for Best Developer Tool. The
project was hosted on TuxFamily (fr) from 2010 to 2015; since 2015 Notepad++ has been hosted on GitHub. Notepad++ uses the
Scintilla editor component.
Sublime Text is a cross-platform source code editor with a Python application programming interface (API).
It natively supports many programming languages and markup languages, and its functionality can be extended by users
with plugins, typically community-built and maintained under free-software licenses.
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