Delphi and C++ Builder components you can use to add messaging functionality into your applications.

uses standard Windows SimpleMAPI API
compatible with MS Outlook, Outlook Express, Mozilla Thunderbird and other email clients
available for Delphi/C++ Builder 5 - 10.2 and Lazarus 1.6.4
source code included in registered version
distributing components in applications is royalty free

exe4j is a Java exe maker that helps you integrate your Java applications into the Windows operating environment, whether they are service, GUI or command line applications. If you want your own process name instead of java.exe in the task manager and a user friendly task-bar grouping in Windows XP, exe4j does the job. exe4j helps you with starting your Java applications in a safe way, displaying native splash screens, detecting or distributing suitable JREs and JDKs, startup error handling and much more.

Delphi and C++ Builder components for automating Microsoft Office.

supports Microsoft Office 97 - 2013
contains Excel and Word components
available for Delphi/C++ Builder 5 - 10.1 and Lazarus 1.6
source code included in full version
distributing components in applications is royalty free

j@vascript engine for Delphi.

uses Microsoft ChakraCore j@vascript engine
supports Windows 32 and Windows 64
available for Delphi 6 - 10.1 and Lazarus
source code included in full version
distributing library in applications is royalty free

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.

supports the latest ADO 2.8 library
compatible with any ADO 1.5 - 2.8 libraries
provides full access to ADO objects
available for Delphi/C++ Builder 5 - 10.1 and Lazarus 1.6
source code included in full version
distributing components in applications is royalty free

Delphi library for automating LibreOffice.

complete LibreOffice API supported
available for Delphi 7 - 10.1
source code included in full version
distributing library in applications is royalty free

Delphi library for automating LibreOffice.

complete LibreOffice API supported
available for Delphi 7 - 10.1
source code included in full version
distributing components in applications is royalty free