Javadoc-Help is an add-on module for Emacs that let you search a class through multiple online and local javadocs quickly, and view the found class documentation in the system web browser.
Records mode allows Emacs users to keep an online personal journal. Records indexes your personal journal by subject and date, understands web compatible links to a variety of documents, keeps track of TODO lists and operates as an editor and a browser.
Elpoint is a presentation tool which runs on Emacs.
Dynamic presentation content can be developed easily.
Inline images can be displayed in the presentation.
The images can be retrieved from web sites only by pecifying the image's URL.
js-test.el is a bit of elisp which makes running javascript tests in an emacs js-comint window easy from within the code in question. It's based on Steve Yegge's js2-mode and js-comint.el.