Examples of powerful LaTeX packages and techniques in use — a great way to learn LaTeX by example. Search or browse below.
The Chicago Citation Style with biblatex
The biblatex-chicago package implements the citation style of the Chicago Manual of Style, 16th edition. In this example, the notes option causes biblatex's autocite command to put citations in footnotes. The package can also produce inline author-year citations in the Chicago style. See the package documentation for more information.
Footnote Citations with Biblatex
This example shows how to create citations in footnotes using biblatex. Biblatex automatically formats references and citations, much like BibTeX, but biblatex is more robust and more powerful. You can (almost certainly) use your existing .bib databases with biblatex, it comes with a wide variety of styles built in, and it's much easier to write your own custom styles.
In this example, we use the verbose-ibid style to generate footnotes with automatic “ibid.” abbreviations. For a full list of styles, see the user guide in the biblatex manual.
Track Changes in LaTeX with trackchanges
Note: TrackChanges is not part of TeX Live, and hasn't been updated in a while. Instead, changes.sty, a package for the same purpose, is available in TeX Live and more recent. You can find the example template here.
TrackChanges is a package for collaboratively editing LaTeX documents which allows multiple editors to make changes & add annotations to a document.
Here we present a short example of it's use, which you can use as a template to get started.