Lets explain the categories:
Software - Any program that can be downloaded and used on your computer.
Websites - An informational website for businesses, organizations, and etc..
Web Applications - A whole standalone application that can be used in-browser, or online.
Mobile Applications - Any cellphone app out there, Android, iOS, as long as it is coded.
Web Elements - Any part of a website released by itself. Includes widgets, buttons, scrollbars, video players, etc..
Frameworks, Templates, and API's - A bunch of web elements piled into one to create a whole UI.
Themes and Skins - Customizations made with code, such as CSS Firefox themes.
Start Pages - A page on which someone can start their web browser with. Usually consists of a search bar and some links.