Free Open Source Dataset for Data Science or Machine Learning Projects - Find here

The Basic need for any analysis is data, it is the evidence for making decisions. Hence we opt for providing websites where you could download free data for the projects. Obviously, government data and many natural climatic conditions data are available to surprise you.

Follow here,

US - 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
Labeled 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/
    A 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