Olelo is a wiki that stores pages in a Git repository, supports many markup styles and has an extensible, hackable architecture!

Features:
 * Edit, move or delete pages;
 * Page attribute editor;
 * Support for hierarchical wikis (directory structure);
 * File upload;
 * History, commit and diff view;
 * Locales (Czech, English, French, German);
 * Support for many markup languages (Creole, Markdown, Textile, ...);
 * RSS/Atom changelog for whole wiki or pages; Section editing for Creole;
 * Embedded LaTeX formulas; Syntax highlighting;
 * Image resizing, SVG to PNG/JPEG conversion;
 * Auto-generated table of contents;
 * Previews;
 * View pages as S5 presentation;
 * Privacy features: Access control lists, Private wiki, Read-only wiki.