Update README.md

Author: krzjoa

README.md

@@ -202,6 +202,7 @@
 * [swifter](https://github.com/jmcarpenter2/swifter) - A package which efficiently applies any function to a pandas dataframe or series in the fastest available manner.
 * [pandas_flavor](https://github.com/Zsailer/pandas_flavor) - A package which allow to write your own flavor of Pandas easily.
 * [pandas-log](https://github.com/eyaltrabelsi/pandas-log) - A package which allow to provide feedback about basic pandas operations and find both buisness logic and performance issues.
+* [vaex](https://github.com/vaexio/vaex) - Out-of-Core DataFrames for Python, ML, visualize and explore big tabular data at a billion rows per second.
 
 ### Pipelines
 * [pdpipe](https://github.com/shaypal5/pdpipe) - Sasy pipelines for pandas DataFrames.