Old question but still deserves an up-to-date answer.
Current 'settled in' solutions are:
IntraWeb:
https://www.atozed.com/intraweb/
uniGUI:
http://unigui.com/
Introduction
uniGUI Web Application Framework extends Web application development experience to a new dimension. uniGUI enables Delphi developers to create, design and debug web applications in IDE using a unique set of visual components. Each component is designed to provide same functionality of its counterpart visual component in Delphi VCL. This provides a very comfortable development environment very close to native VCL application development with an easy learning curve. uniGUI Web applications can be deployed to a server using one of the available deployment options such as Windows Service, Standalone Server or ISAPI Module.
Product Highlights:
Based on industry's most advanced JavaScript library Sencha Ext JS.
Includes OEM license for Sencha Ext JS. (Please see licensing for details).
A unique platform to create stateful web applications.
Complete IDE support for creating projects, designing forms, frames and handling data modules.
Advanced support for scripting client side JavaScript events.
Library core is fully optimized to achieve highest level of scalability.
Including advanced Stress Test Tool utility.
Comes with various deployment options: ISAPI Module, Standalone Server and Windows Service.
Supported Delphi versions: Turbo Delphi Pro, Delphi 2006, Delphi 2007, Delphi 2009, Delphi 2010, Delphi XE, XE2, XE3, XE4, X5, XE6, XE7, XE8, Delphi 10 Seattle, 10.1 Berlin, 10.2.3 Tokyo and 10.3.3 Rio (Win32 & Win64 platforms). (Linux support is in the roadmap)
C++ Builder supported.
Supported Browsers: IE 9+, Microsoft Edge, FireFox, Chrome, Safari and Opera
New state-of-the-art uniGUI HyperServer technology.
TMS WebCore:
https://www.tmssoftware.com/site/tmswebcore.asp
RADical Web
Modern SPA web application model
Pure HTML5/CSS3/Javascript based applications
Standard component framework for common UI controls and access to browser features
Debugging in Pascal code via the browser
Backed by a solid & proven Delphi Pascal to Javascript compiler that was years in development
Reuse skills and components Component based RAD development integrated
in the Delphi IDE A truly revolutionary & innovative TMS FNC component
framework that is now also web enabled, allowing to create UI controls
that can be used on VCL, FMX, LCL and WEB! Open to consume other
existing Javascript frameworks & libraries Open to use HTML/CSS for
design Open to use other jQuery controls or even other Javascript
frameworks Offers Pascal class wrappers for jQuery controls from the
jQWidgets library Easy interfacing to REST cloud services including to
TMS XData for database
Easy Deployment Application consists of HTML & Javascript files only
that can be easily deployed on any light or heavyweight webservers Use
any existing load-balancing software and/or techniques for highest
performance Small and convenient debug webserver is included for fast
RAD development