Maryam Mirzakhani's works Maryam Mirzakhani has made several contributions to the theory of moduli spaces of Riemann surfaces.
Mirzakhani was awarded the Fields Medal in 2014 for "her outstanding contributions to the dynamics and geometry of Riemann surfaces and their moduli spaces." She died July 15, 2017.
I'm not expert in these areas of mathematics, but I am eager to know her main ideas and the importance of her results. 
Can one draw a general picture of her works?
(Any expository reference will be appreciated).
 A: A nice introduction, accesible to the layman (at least to a layperson with science studies), is published by the e-journal Quanta Magazine. See
A Tenacious Explorer of Abstract Surfaces by Erica Klarreich.
Also at Wired.
Update: There is a detailed description of her work in this paper by Curtis McMullen.
A: Alex Wright has written an introductory survey on translation surfaces and orbit closures, which may be helpful in appreciating why Mirzakhani's most recent results on orbit closures of translation surfaces are so important.
Alex Wright - Translation surfaces and their orbit closures: An introduction for a broad audience
A: You might be interested in
Anton Zorich's paper "The Magic Wand Theorem of A. Eskin and
M. Mirzakhani"
which is the English version of
Anton Zorich's paper "Le théorème de la baguette magique de A. Eskin et
M. Mirzakhani"
published in French in
volume 142
of
La Gazette des Mathématiciens.
This volume also has papers about other recipients of the 2014 Fields Medal.
A: This is an article in German on Mirzakhani's early (published at the age of 19) paper on graph coloring, where she gave an example of a 3-colorable, but not 4-list-colorable graph: https://www.mathematik.de/images/Blog/Dokumente/dmvm-2015-0015.pdf
A: Following up on Tom Church's answer, Alex Wright has recently written an overview for Mirzakhani's work on surfaces.
A tour through Mirzakhani's work on moduli spaces of Riemann surfaces
A: A very good expository article (in Farsi) on recent work of Maryam Mirzakhani can be found here.  (PDF)
A: Here you can find some dissertations related to Mirzakhani's work 
Moduli spaces and Weil-Petersson volume
Intersection theory on moduli spaces of
curves via hyperbolic geometry
Norman Nam Van Do
Lectures and notes: Mirzakhani’s volume recursion and
approach for the Witten-Kontsevich theorem on moduli
tautological intersection numbers
Scott A. Wolpert
Also here is the good blog about Mirzakhani's work 
https://tlfeng.wordpress.com/2014/09/04/maryam-mirzakhani-and-dynamics-on-moduli-space/
