Writing style:

OR/CS/Math blogs:

Data visualization packages:

  • Graphviz
  • dot2tex is a LaTeX-friendly converter from Graphviz (xdot) to converting xdot PSTricks or PGF/TikZ commands, with support for LaTeX labels and arrows. [Kjell Magne Fauske]
  • Online graph generator

Useful tools:

Others: