Custom URL schemas provide a way to reference resources inside your app.
LinCastor is a Mac application that encapsulates functions that enable you, as a user, to register a custom URL scheme and link it with an application, shell or AppleScript handler.
Its main interface looks quite common to other Mac applications, having a left-side panel, and a right-side screen space with tabs and various options. The tabs seem poorly polished, as they look outmoded and have a badly crafted design. The buttons, also, feel a bit clunky when mouse-pressed.
By using LinCastor, users are able, for example, to open a website in both iOS and Mac apps, with a pleasing behavior on both operating systems. You can use this application to associate all sorts of applications together or trigger custom workflows.
You could set up the a specific web-browser, a well-known URL schema, and link your website to it, so when you click the web-browser it would open your website instead of the default web-browser page.
All in all, LinCastor can be used in many ways, depending on user needs. Its main characteristic is the effectiveness on how it manages to bridge web and local apps.