Open Source Software for Linux
gedit
gedit is a free and open source IDE native to the GNOME desktop environment. With gedit you can work with a wide range of programming languages including C, C++, Java, JavaScript, HTML, XML, Python and Perl. The IDE automatically detect programming language and provide code color highlighting accordingly. It also include features like search and replace, spell checking, printing and support for most filte types.
nomacs
nomacs is a free, open source, cross-platform image viewer. With nomacs you can easily view and manage all common file formats including jpg, png, tif, bmp, raw and many more. The sleek user interface provided by nomacs features a semi-transparent widgets that display additional information such as thumbnails, metadata or histogram.
pgAdmin
The software pgAdmin is the most popular free and open-source administration panel for PostgreSQL. With pgAdmin developers can manage their database and also use it as a tool that is part of the development process. The software is released under the PostgreSQL/Artistic licence and can be used on macOS, Linux, Unix and Windows to manage PostgreSQL 9.2 and above.
Nextcloud
With Nextcloud, users can host their own secure cloud solution for file storage, collaboration and communication for enterprise or personal purposes. Nextcloud gives you full control over your own data and where and how you host it. The software can be hosted on-premise or on any VPS or cloud instance provided by third-party web hosts. If you value privacy and security, Nextcloud might be the right choice for you. Nextcloud is both free and open source and developed in an open, transparent and trustworthy manner.
Lubuntu
Lubuntu is a free and light-weight Linux desktop distribution developed by the Lubuntu Community. The distribution combines the stability of Ubuntu with the faster LXQt desktop to provide a snappy operating system for low-spec computers. Lubuntu has been in active development since 2011 where it was first introduced with the LXDE desktop environment.
KDevelop
KDevelop is a fully featured, plugin extensible IDE for C/C++ and many other programming languages. Supported platforms include Linux, Solaris, FreeBSD, macOS and other Unix flavors as well as Microsoft Windows. It is based on KDevelop Platform, the KDE Frameworks and the Qt libraries. KDevelop is a free and open source software under development by KDE since 1998.
Qt Creator
Qt Creator is a cross-platform integrated development environment (IDE) built for the maximum developer experience. Qt Creator runs on macOS, Linux and Windows desktop operating systems, and allows developers to create applications across desktop, mobile, and embedded platforms.
Chromium
Chromium is a free and open source web browser developed by Google. The project builds the open source version of the Google Chrome web browser. Google make use of the source code to build and improve their proprietary version of Google Chrome. And Google is not alone, many other browsers like Microsoft Edge, Opera and others a based on Chromium.
JDownloader
JDownloader is a free, open-source download management tool with a huge community of developers that makes downloading as easy and fast as it should be. Users can start, stop or pause downloads, set bandwith limitations, auto-extract archives and much more.
LibreWolf
A privacy, security and freedom focused web browser forked from Firefox. LibreWolf is always built from the latest Firefox stable source, for up-to-date security and features along with stability. It uses more than 500 privacy, security, performance settings, patches and LibreWolf-Addons, and is designed to minimize data collection and telemetry performed via Firefox's updater and crashreporter.