The Google Firebase Cloud Database is used in many mobile and web applications worldwide and there are well-documented libraries for many languages and platforms. For Delphi, the cross-platform library FB4D supports the Firebase Realtime Database, the Firestore Database, the Firebase Storage (for file storage), and Firebase Functions (for calling server functions). For authentication, FB4D currently supports email/password authentication and anonymous login.

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.

DIFileFinder is collection of Delphi components to search the file system for files and or folders matching (or not matching) particular attributes and / or name patterns. Pattern syntax includes standard wildcards as well as full Perl compatible regular expressions. DIFileFinder supports inclusion as well as exclusion filters.

InterBase is one of the fastest native databases available, with a small lightweight footprint. InterBase leverages today's multi-core CPUs and multi-CPU systems, along with a unique versioning approach and advanced disk I/O caching, to retrieve and update your data blazingly fast. InterBase is an SQL Standards compliant database. InterBase strictly follows SQL industry standards. InterBase supports unicode and is ideal for any character set globally. InterBase offers multiple join unicode, real-time event alerts, and our patent pending Change Views’ SQL-based change tracking.

YuPcre2 is a library of Delphi components and procedures that implement regular expression pattern matching using the same syntax and semantics as Perl, with just a few differences. There are two matching algorithms, the standard Perl and alternative DFA algorithm:

The Perl algorithm is what you are used to from Perl and j@vascript. It is fast and supports the complete pattern syntax. You will likely be using it most of the time.
DFA is a special purpose algorithm. If finds all possible matches and, in particular, it finds the longest. It never backtracks and supports partial matching better, in particular multi-segment matching of very long subject strings.

JVCL is a library of over 600 Delphi visual and non-visual Delphi/C++Builder components. It supports Delphi/C++Builder 6 and newer.

Abbrevia is a compression toolkit for Delphi and C++Builder.
It supports compressing and decompressing PKZIP, Microsoft CAB, tar, gzip, and
bzip2 archives, and can create self-extracting executables. On Windows it also
provides Delphi wrappers for the LZMA, Bzip2, and WavPack SDKs, and PPMd decompression.

Async Professional is a comprehensive communications toolkit for Embarcadero Delphi and C++Builder. It provides direct access to serial ports, TAPI, and the Microsoft Speech API. It supports faxing, terminal emulation, VOIP, & more.

Abbrevia is a compression toolkit for Delphi and C++Builder.
It supports compressing and decompressing PKZIP, Microsoft CAB, tar, gzip, and
bzip2 archives, and can create self-extracting executables. On Windows it also
provides Delphi wrappers for the LZMA, Bzip2, and WavPack SDKs, and PPMd decompression.

VCL-component set for generate reports and documents. It provides a visual templates designer, access to the most popular datasources, a reporting engine, preview, export filters to 30+formats and deployment to clouds, web, e-mail, and print.

Add-in Express for Office and Delphi VCL is the first visual tool for writing a COM add-in, smart tag and RTD server in Delphi. It completely supports these technologies and makes them very comfortable for programming extensions for all available Microsoft Office versions across 2000 through Microsoft Office 2019 32-bit and 64-bit.

Zoople Easy FTP is an ActiveX FTP DLL for software developers. Manage remote files from your applications with ease. Integrates easily into any development environment that supports ActiveX DLLs.

PHPMaker is a powerful automation tool that can generate a full set of PHP scripts quickly from MySQL, PostgreSQL, 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 can also create summary reports, crosstabs reports and dashboards with jаvascript (HTML5) charts (column, bar, line, pie, area, doughnut, multi-series and stacked chart) to summarize and visualize your data. PHPMaker is designed for high flexibility and has numerous options for generating PHP applications that best suits your needs. The generated code is clean, straightforward and easy-to-customize. The PHP scripts can be run on Windows servers or Linux servers. PHPMaker can save you tons of time and is suitable for both beginners and experienced developers alike.

IntraWeb supports RAD Studio / Delphi XE2, and in fact is included as a part of RAD Studio / Delphi XE2. If you have RAD Studio / Delphi XE2, you already have IntraWeb XII. RAD Studio 2009, 2010, XE, XE2, XE3, XE4, XE5, XE6, XE7, XE8, 10 Seattle, 10.1 Berlin, Delphi 10.2 Tokyo, Delphi 10.3 Rio and Delphi 10.4 Sydney, RAD Studio/Delphi/C++Builder 11 Alexandria.