The JAB Workbench Freeware Libraries include the JAB Recipe Library, which contains numerous GUI Widgets and a framework for connecting to a SQLite database using a Java applet. Many example projects are provided, divided into various packages, including GUI Examples, Database Access Examples, and Advanced Examples.
MockMockWeb is a Heroku-ready Node.js-based Web application server which allows you to mock up a website in seconds. It allows you to instantly launch a website which sends an empty page (with status 200) to any request/URL and edit any page on the spot. You can also edit the layout shared throughout your website. It lets you build a mock (sometimes real) website in a request-driven interaction.
MyPlayer is an audio file player for embedding in HTML documents. It supports MP3, Ogg Vorbis, and other file formats, playlists for navigating through multiple tracks, reading information from M3U playlists (with extended information), and ID3 tags (v1 and v2). Many commented usage examples are included.