LaTeX

1. LaTeX2e for authors

   Document structure, classes and packages.

2. LaTeX documentation index

   Official guides, references and FAQ.

3. LaTeX2e for class and package writers

   How to write document classes and packages, including defining commands and options.

4. Font selection

   The New Font Selection Scheme: font families, shapes, series and encodings.

5. Math with amsmath

   Display math, alignment and theorems.

6. Graphics and floats

   Including graphics and figure placement.

7. Bibliographies (biblatex)

   BibTeX/biber bibliographies, citation commands and reference styles.

8. Cross-references and hyperref

   Labels, cross-references, hyperlinks and PDF metadata.

9. Page layout

   Page size, margins and layout dimensions.

10. Languages and encodings

    Language support, hyphenation patterns and input and font encodings.

11. TikZ and PGF

    Drawing diagrams programmatically with TikZ and PGF.

12. Beamer presentations

    Creating slide presentations with frames, themes and overlays.

13. Tagged PDF and accessibility

    The tagged PDF project for accessible PDF output.

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.