Data processing section under libraries. Closes #330

README.md

@@ -33,6 +33,7 @@ If you want to contribute, please read [this](CONTRIBUTING.md).
   - [Configuration](#configuration)
   - [Cryptography](#cryptography)
   - [Database](#database)
+  - [Data processing](#data-processing)
   - [Data structures](#data-structures)
   - [Date and time](#date-and-time)
   - [Distributed Systems](#distributed-systems)
@@ -567,6 +568,13 @@ See also [Are we (I)DE yet?](https://areweideyet.com/) and [Rust and IDEs](https
   * [ivanceras/rustorm](https://github.com/ivanceras/rustorm) — an ORM for Rust [![Build Status](https://api.travis-ci.org/ivanceras/rustorm.svg)](https://travis-ci.org/ivanceras/rustorm)
 
 
+### Data processing
+
+* [bluss/rust-ndarray](https://github.com/bluss/rust-ndarray) — N-dimensional array with array views, multidimensional slicing, and efficient operations
+* [kernelmachine/utah](https://github.com/kernelmachine/utah) — Dataframe structure and operations in Rust
+* [weld-project/weld](https://github.com/weld-project/weld) - High-performance runtime for data analytics applications
+
+
 ### Data structures
 
 * [bluss/rust-itertools](https://github.com/bluss/rust-itertools) — [<img src="https://api.travis-ci.org/bluss/rust-itertools.svg?branch=master">](https://travis-ci.org/bluss/rust-itertools)