Recently Hacker News was full of surprises to me. In a single day I’ve discovered, thanks to it, two very good plugins for Emacs I started using and improving my way of working.
These two extensions are for python and web developers.
The second one is a tool for code autocompletion in python. It is well known that analysis of dynamic languages is a big problem: It’s hard to determine what instance a variable is if not at runtime. Jedi tries to solve this problem. So far it was the beste autocompletion for python on Emacs with the ability to go to definition of functions even in the standar library and to easily look for documentation.
I highly suggest using these two extensions, if you have better/complementary ones, please speak up! I would love to give them a try.