Find articles that share datasets and code
paperswithcode.com. 
It contains publications and the corresponding code. 

Most top computer science conferences ask for relevant supplementary material, which includes code. Many papers (atleast in Computer Vision/Machine Learning) which are published in top venues contain links to the code as well. 

Many professors also maintain public git repos, which contains the code for their publications. You can search on Github or go to the homepage of the professor to find the link.