Indy.Sockets is an internet component suite that uses the blocking socket model. Indy.Sockets includes both clients and servers using TCP, UDP, and raw sockets. Indy.Sockets also includes clients and servers for higher level protocols such as SMTP, POP3, NNTP, HTTP, and many more. 

Indy.Sockets is developed using the Object Pascal language (commonly referred to as Delphi), but can used in any of the following programming languages: 

• C#
• C++
• Delphi
• J#.NET
• Visual Basic.NET
• Any other .NET language

Indy.Sockets can be used to develop applications for a number of run-time environments and platforms, including: 

• Win32
• Linux
• .NET version 1.1
• Mono

Indy.Sockets can be used in a number of IDEs, including: 

Indy.Sockets is a single source library; one version of the source code is used to produce the libraries and assemblies used for each of the targeted platforms and design-time environments. 

For Borland IDEs, Indy.Sockets is built using packages. For the VCL.NET environment, Indy.Sockets is a managed assemblies and is compatible with the Microsoft .NET framework. For IDEs on the .NET platform that do not support the Delphi language (Visual Studio.NET and Mono), Indy.Sockets is provided as a single managed assembly.