KiCad is a free and open source EDA (Electronic Design Automation) application for designing PCB (Printed Circuit Boards) that runs on Windows, Linux and Mac OS, featuring a fully-featured schema editor for PCB layouts, a 3D viewer and more.
DBeaver is a free and open source multi-platform database tool for developers, SQL programmers, database administrators and analysts. It supports a number of popular databases, including MySQL, PostgreSQL, MariaDB, SQLite, Oracle, DB2, SQL Server, Sybase, MS Access, Teradata, Firebird, Derby and more.
Mozilla Firefox (or simply Firefox) is a free and open-source web browser. Firefox is available for Windows, macOS and Linux operating systems, with its Firefox for Android available for Android, and uses the Gecko layout engine to render web pages, which implements current and anticipated web standards.
ShareX is a feature-packed screenshot and screen recording utility for Windows, featuring editing and annotation of screenshots, exporting and uploading to multiple services, configurable workflows and much more.
Gadwin PrintScreen is a free for personal use screenshot tool for Windows and MacOS that allows you to capture full screens, windows or parts of screens. The professional version allows you to edit and annotate captured images.
Greenshot is used to create full or partial screenshots. The captured screenshot can be annotated and edited using the built-in image editor before exporting it either to an image file, email attachment, printer or clipboard.