I am obsessed with DokuWiki. It's such a versatile wiki software: With the right combination of plugins and some tinkering here and there, you can make DokuWiki do just about anything. The development community is very supportive. The look and feel of the wiki can be customized to fit any needs without n...
ProGood selection of themes
ProRuns on any PHP server
ProA dedicated page for recent changes
ProGood selection of plugins
ProPlain-text file storage
ProLocal and open source
ProEasy to set up and mantain
Asciidoctor is the best lightweight markup language available. It's structured, supports semantic markup, and extensible. It's great for longer documents. It's also better than Markdown for short, ad-hoc materials.
ProShorter, more concise than Markdown
ProSupports semantic markup
ProSupported by GitHub