Data.gov

NOAA - https://www.ncdc.noaa.gov/cdo-web/

atmospheric, ocean

Bureau of Labor Statistics - https://www.bls.gov/data/

employment, inflation

US Census Data - https://www.census.gov/data.html

demographics, income, geo, time series

Bureau of Economic Analysis - http://www.bea.gov/data/gdp/gross-domestic-product

GDP, corporate profits, savings rates

Federal Reserve - https://fred.stlouisfed.org/

curency, interest rates, payroll

Quandl - https://www.quandl.com/

financial and economic

Data.gov.uk

UK Dataservice - https://www.ukdataservice.ac.uk

Census data and much more

WorldBank - https://datacatalog.worldbank.org

census, demographics, geographic, health, income, GDP

IMF - https://www.imf.org/en/Data

economic, currency, finance, commodities, time series

OpenData.go.ke

Kenya govt data on agriculture, education, water, health, finance, …

https://data.world/

Open Data for Africa - http://dataportal.opendataforafrica.org/

agriculture, energy, environment, industry, …

Kaggle - https://www.kaggle.com/datasets

A huge variety of different datasets

Amazon Reviews - https://snap.stanford.edu/data/web-Amazon.html

35M product reviews from 6.6M users

GroupLens - https://grouplens.org/datasets/movielens/

20M movie ratings

Yelp Reviews - https://www.yelp.com/dataset

6.7M reviews, pictures, businesses

IMDB Reviews - http://ai.stanford.edu/~amaas/data/sentiment/

25k Movie reviews

Twitter Sentiment 140 - http://help.sentiment140.com/for-students/

160k Tweets

Airbnb - http://insideairbnb.com/get-the-data.html

A TON of data by geo

UCI ML Datasets - http://mlr.cs.umass.edu/ml/

iris, wine, abalone, heart disease, poker hands, ….

Enron Email dataset - http://www.cs.cmu.edu/~enron/

500k emails from 150 people

From 2001 energy scandal. See the movie: The Smartest Guys in the Room.

Spambase - https://archive.ics.uci.edu/ml/datasets/Spambase

Emails

Jeopardy Questions - https://www.reddit.com/r/datasets/comments/1uyd0t/200000_jeopardy_questions_in_a_json_file/

200k Questions and answers in json

Gutenberg Ebooks - http://www.gutenberg.org/wiki/Gutenberg:Offline_Catalogs

Large collection of books

IMAGES

ImageNet - http://image-net.org

14M images of objects

Google - https://ai.googleblog.com/2016/09/introducing-open-images-dataset.html

9M image URLs with labels

Microsoft Coco - http://cocodataset.org

330k images, most labeled

Labelled Faces in the Wild - http://vis-www.cs.umass.edu/lfw/

13k face images with names

Stanford Dogs - http://vision.stanford.edu/aditya86/ImageNetDogs/

120 dog breeds, 20k images

AUTONOMOUS CARS

Berkeley DeepDrive - https://bdd-data.berkeley.edu/

Massive dataset including 100k videos with 1100 hours of hd driving

Belgian Traffic Signs - http://www.vision.ee.ethz.ch/~timofter/traffic_signs/

10k images

Bosch Small Traffic Signals - https://hci.iwr.uni-heidelberg.de/node/6132

5k training and 8k test images

WPI Traffic Light, Pedestrian, Lane-Keeping - http://computing.wpi.edu/dataset.html

30GB of training and test data from Worcester, Mass

UCSD Lisa - http://cvrr.ucsd.edu/LISA/datasets.html

Vehicle detection, traffic signals