LyX is a document processor that encourages an approach to writing based on the structure of your documents, not their appearance. It is intended for people people who write and want their writing to look great without tinkering with formatting details, font attributes, or page boundaries. On screen, it looks like any word processor, but it uses the TeX engine for printed output and producing richly cross-referenced PDFs. It is stable and fully featured.
Merchant-Store is an easy-to-use Perl-based shopping cart script with an integrated product manager, backend order manager, and real-time credit card processing capabilities. There are three versions available. The first is for Signio-compatible credit card processing. The second is for AuthorizeNet-compatible credit card processing. The third is an AuthorizeNet modification for Selena Sol's web_store.
Mioga is a groupware application suitable for intranet use. All the functionality of Mioga can be reached through any HTML browser. The interface is designed with XML/XSL technology which allow the look and feel and the ergonomics of Mioga to be fully and easily customizable. It is written in Perl and uses a PostgreSQL database. It uses DAV for file management, providing you with a complete DAV workspace with Mioga user access controls (ACLs). Mioga includes the followig applications: file manager, organizer, todo tasks, shared folders (with version control), forms, intranet search, and administration tool.