Meta: requested TeX packages

[pkra]

• LaTeX macros for MathML constructs (e.g., mtable)
  • options for TeX packages to benefit from things that are easier in MathML, e.g, equalcolumns/rows
• braket
• siunitx [Extension for siunitx #447]
• Cyrillic macros [cf [TeX input] support for Cyrillic #1369]
• stmaryrd macros [Add support for stmaryrd #1143]
• bordermatrix (needs colspan/rowspan?; requested on various SE sites)
• algorithmcx, listings
  • google's prettify can guess programming languages. https://github.com/google/code-prettify
• babel macros (e.g., Russian (see 6.4) via twitter)
• fontpackages (stmaryd, wasysym etc) (via \unicode?)
• Q-circuit (via xyjax?) see this discussion
• mathapedia (pstricks)
• SageTeX + SageCell
• chemfig
• Feynman diagrams (cf. http://photino.github.io/jquery-feyn/index.html)
• improve handling of unicode characters (e.g., U+03B1 being treated as \alpha, and so on)
• something like \turn[deg]{math}, cf. http://ctan.org/pkg/rotating
• stix package ([TeX input] re-implement macros from the stix package #1371)

[burnpanck]

For siunitx: see #447 and my unfinished implementation at https://github.com/burnpanck/MathJax-third-party-extensions/tree/add-siunitx-tex-extension.

[pkra]

Thanks, @burnpanck -- I've added a link in the OP.

[hpvd]

+1 for units! @burnpanck many thanks for your work!
Having perfect looking units at all there numbers with always the perfect space between number and unit but never a linebreak is one of the reasons engineers use latex!
And engineers would adore to have this on their websites too :-)