dbExpress is a database-independent layer that defines common interface to provide fast access to SQL Server from Delphi and C++Builder on Windows for both 32-bit and 64-bit platforms. For this server, dbExpress provides a driver as an independent library that implements the common dbExpress interface for processing queries and stored procedures. As data-access layer is thin and simple, dbExpress provides high performance database connectivity and is easy to deploy. You can use our driver in the same way as the one supplied by Embarcadero. dbExpress driver for SQL Server provides access to SQL Server database. It works using high performance Microsoft OLE DB technologies. The driver requires OLE DB installed on the workstation.

The Ultimate Solution When You Need To Access Excel Files With Delphi and C++ Builder.

You can use the Borland Database Engine (BDE) to provide database access for standard Delphi data components. See the DEPLOY document for specific rights and limitations on redistributing the BDE.

Universal Data Access Components (UniDAC) is a powerful library of nonvisual cross-database data access components for Delphi, Delphi for .NET, C++Builder, and Lazarus (Free Pascal). We have combined the experience of long-term successful development into one product, which provides unified access to the popular database servers like Oracle, Microsoft SQL Server, MySQL, InterBase, Firebird, PostgreSQL, SQLite, DB2, Microsoft Access, Sybase Advantage Database Server, Sybase Adaptive Server Enterprise, and other databases (using ODBC provider).

The TMS Cloud Pack contains components that offer integration with several cloud services.

FireDAC is a powerful, yet easy-to-use access layer that supports, abstracts, and simplifies data access, providing all the features needed to build real-world high-load applications. FireDAC provides a common API for accessing different database back-ends, without giving up access to unique database-specific features and without compromising on performance. Use FireDAC in Android, iOS, Windows, and Mac OS X applications you are developing for PCs, tablets and smartphones.

Delphi and C++ Builder components for universal data access using ADO (ActiveX Data Objects). ADO Component Suite is thin wrapper for ADO objects and it's very well suited for building application servers and clients when Delphi/C++ Builder TDataSet capabilities aren't required.
ADO Component Suite is part of Adonis Component Suite.

Delphi and C++ Builder components for accessing MS Access databases using DAO (Data Access Objects) and ACEDAO.

supports DAO 3.6, DAO 3.5 and ACEDAO
no need for Borland Database Engine (BDE)
fast native access to data without BDE
provides access to DAO objects
compatibility with standard Delphi data-aware components
available for Delphi/C++ Builder 5 - XE6 and Lazarus 1.2
source code available in Professional version
distributing components in applications is royalty free