GNU Aspell is a spell checker designed to eventually replace Ispell. It can either be used as a library or as an independent spell checker. Its main feature is that it does a superior job of suggesting possible replacements for a misspelled word than just about any other spell checker out there for the English language. Unlike Ispell, Aspell can also easily check documents in UTF-8 without having to use a special dictionary. Aspell will also do its best to respect the current locale setting. Other advantages over Ispell include support for using multiple dictionaries at once and intelligently handling personal dictionaries when more than one Aspell process is open at once.
Java Development Environment for Emacs (JDEE) is an Emacs-based integrated development environment (IDE) for developing Java applications and applets. Features include multiple code browsers, a JPDA-based debugger, method and field completion, template-based and procedure-based code generation, Java source code interpreter, context-sensitive help, and more.
make_faq is an HTML generator that builds chunks/chapters/questions-and-answers or whatever, and builds indexes to hold it all together. It's a fairly general purpose tool for creating a set of indexed pages, but it's common usage is to build FAQ (Frequently Asked Questions) HTML from text documents. See the examples for a better understanding.
Poplog is a high-level programming environment including the languages: Pop-11, ML, Common LISP (including CLOS), and Prolog. Poplog allows the programmer to write mixed-language programs and perform incremental compilation. It includes a fully customisable text editor (VED) with multi-font capabilities, a comprehensive X interface including Athena, Motif, and OLIT widget set support, a custom Poplog widget set including a neat text-editing widget, and an easy to use graphics widget. It supports graphics elements such as graph drawing, turtle graphics, high-level support for creating dialog-box based applications, and a multi-window X based implementation of VED (XVed). Poplog implementations are available for Solaris and Intel Linux, AIX on PPC, Digital Unix Alpha and Windows9X/NT.
Site Index is a simple script which generates HTML pages showing a site index for all of your local domains. It uses the natural hierarchy of your filesystem, so if you've organized your pages well, the job is fully automated. It breaks the index into multiple pages to respect a links-per-page limit, and can do some sorting/management of the results according to domain/page "importance".