DokuWiki is a popular wiki software that notably doesn't require a database. It uses plain-text files and has its own, very intuitive syntax for wiki content. Some might prefer an alternative for that matter, one with built-in Makrdown support.
BoltWire is an easy to use web development system with surprising flexibility and power. Our innovative architecture plus best-in-class forms processing makes it easy to create complex, interactive, web applications fast. Best of all, it's FREE.
Waybook helps you build a playbook for your business, with all your training materials and documents in one place. Now it's easy to capture, store, and share knowledge and business information with your team, so you can scale faster.
Capture the big ideas and the little things, learn from the past and become a smarter person today. Noteship is a Personal Information Manager that combines notes, todos, and reminders and is based on simple files and folders.