Cross-platform development with Visual Studio easy and comfortable. It supports:

Barebone embedded systems and IoT modules (see full list)
C/C++ Linux Applications
Native Android Apps and Libraries
Raspberry Pi and other Linux boards
Linux kernel modules (separate VisualKernel product)
Target your own devices and platforms with Extensibility API

CrossVcl is a set of tools for Delphi developers, which can create VCL applications for macOS and Linux with Embarcadero Delphi.

CrossVcl is VCL emulator ?

CrossVcl not an emulator, it is WinAPI implementation for other platform.

InstallBuilder for Qt is a crossplatform packaging tool that makes it easy to build complex installers without writing a single line of Java code. With InstallBuilder for Qt you can:

Generate installers for all supported platforms from one project file, on one machine.
Build installers using either the GUI development environment or by directly editing a human-friendly XML file that can easily be integrated into your automated build process and version control system.
Integrate with the underlying desktop environment and package management systems.
Create start menu shortcuts on Windows systems, KDE/Gnome desktop shortcuts and register with the RPM system on Linux.

FireMonkey implementation for Linux
Start build UI Linux apps with Embarcadero Delphi and FmxLinux

Native Look & Feel
FmxLinux provides high-quality Ubuntu style as default Linux style.

You use the same project, the same code, the same objects and the same elements...
With WINDEV, WEBDEV and WINDEV Mobile, the same source application can be run on several platforms.

WINDEV, WEBDEV and WINDEV MOBILE are supplied with a powerful database with free deployment (local, network, mobile, Cloud, Client/Server, Cluster):
WINDEV, WEBDEV, and WINDEV MOBILE are also connected to the other databases via ODBC, OLE DB and « Native Connectors »: HFSQL, AS/400 & IBM i, Oracle, SQL Server, DB2, MySQL, Informix, PostgreSQL, Progress, Sybase, xBase, SQLite, Access

PHPMaker is a powerful automation tool that can generate a full set of PHP quickly from MySQL, PostgreSQL, Microsoft Access, Microsoft SQL Server, Oracle and SQLite databases. Using PHPMaker, you can instantly create web sites that allow users to view, edit, search, add and delete records on the web. PHPMaker is designed for high flexibility, numerous options enable you to generate PHP applications that best suits your needs. The generated codes are clean, straightforward and easy-to-customize. The PHP scripts can be run on Windows servers or Linux servers (except Microsoft Access). PHPMaker can save you tons of time and is suitable for both beginners and experienced develpers alike.

Sublime Text is a comprehensive text editor that supports plain text and programming languages (including HTML), and it is the portable version of Sublime Text. The user-friendly interface has a modern-looking design that is highly customizable. This means that you can control the font size and color scheme used within the program. In addition to that, you can also hide or reveal certain tabs and tool bars. A search function is available throughout the text and for files. You may switch to full screen mode, customize the layout (e.g. columns, grid), enable syntax highlighting (e.g. Perl, PHP, SQL, XML), use a spell checker, as well as record and save macros, among many other options.

Water is designed from the ground up for a new kind of developer experience that is lightweight yet productive, and does not get in your way of doing what you do best: develop great software.

Cross-platform development with Visual Studio easy and comfortable. It supports:

Barebone embedded systems and IoT modules (see full list)
C/C++ Linux Applications
Native Android Apps and Libraries
Raspberry Pi and other Linux boards
Linux kernel modules (separate VisualKernel product)
Target your own devices and platforms with Extensibility API

PureBasic is a native 32-bit and 64-bit programming language based on established BASIC rules. The key features of PureBasic are portability (Windows, Linux and MacOS X are currently supported), the production of very fast and highly optimized executables and, of course, the very simple BASIC syntax. PureBasic has been created for the beginner and expert alike. We have put a lot of effort into its realization to produce a fast, reliable system friendly language.