Infinite scroll
Automatically load a page when its link gets into the viewport.
Keywords: javascript, show, reveal
Grouping articles
Group articles with few lines of code.
Keywords: group, divide
Pagination
Paginate everything.
Keywords: navigation, paginate
Weighted category cloud
Yet another one.
Keywords: category, tag, cloud, link
Year 4.7
Count the time from the site birth date.
Keywords: date, time, calendar
Mixed glossary index
Another forum challenge.
Keywords: merge, sort, xml