data science

ML Review - Machine Learning Digest
Data Elixir
The Data Science Roundup
Data Science Weekly Newsletter
KDNuggets News
O'Reilly Data Newsletter
The Analytics Dispatch
Hacker News Digest
Data Machina
Import AI
The Wild Week in AI
Data is Plural
Towards Data Science Newsletter
Deep Learning Weekly
Deep Hunt Newsletter
The Algorithm - MIT Technology Review
TOPBOTS: Applied AI for Bussiness
Artificial Intelligence and Deep Learning Weekly
Center for Data Innovation
Data Science Community Newsletter - NYU Center for Data Science
Analytics Vdihya
R-Bloggers
Data Science Central

gymnastics

BBC News
FlowGymnastics

nations/china/technology

China EconTalk

programming languages/python

BangPypers
PyCoder's Weekly | A Weekly Python E-Mail Newsletter

programming languages/r

The R Journal
RWeekly.org

software tools/rails

This Week in Rails