Apps with 'Cross page linking' feature

TiddlyWiki is a single html file with all the characteristics of a wiki - including all of the functionality (including editing, saving, tagging and searching) and the style sheet. Because its a single file, its very portable - you can email it, put it on a web server or share...

Ema Personal Wiki uses Markdown to freely create and manage structured notes, like a website. Using WikiWords you can create notebook with linkable pages for tracking your notes, todo lists, bookmarks, your life - in the most flexible way.