This is a post for self-reference.
There are many LaTeX packages that I come across, and forget about them.
This page will keep a track of those packages. It will be updated with new hacks and packages that are useful.
- For using Linux Libertine (arguably one of the best ) fonts in mathmode
\usepackage{libgreek}
- For making gantt charts natively in LaTeX
\usepackage{pgfgantt}
- For including video/audio files in Beamer presentations
\usepackage{media9}