Lemon is a collection of some must have Django apps (at least at our company):

• lemon.metatags: control meta tags (title, keywords, description) of every page;
• lemon.sitemaps: like django.cotrib.sitemaps, but more powerful;
• lemon.robots: edit robots.txt from admin.
• lemon.pages: multilingual django.contrib.flatpages.
• lemon.publications: some usefull tools to create publications-like apps faster (news, articles, etc.).

Also Lemon has:

• lemon.extradmin: extended django.contrib.admin (in early development);
• lemon.filebrowser: fork of Patrick Kranzlmueller's django-filebrowser;
• lemon.dashboard: dashboard for our admin (also in early development).

If you like it, feel free to fork, send pull requests or report bugs and issues on github.