I finished my preliminary research on available Datasets. Here's what I've found so far:

1. Kaggle
2. UCI
3. Data.gov
4. data.world
5. Google Trends Datastore
6. AWS Public Dataset - S3 buckets
7. Microsoft Research Open Data - Beta

• 1. Big Cities Health Inventory Data

https://bchi.bigcitieshealth.org/indicators/1827/searches/22971

• 2. HealthData.gov

https://healthdata.gov/search/type/dataset?f%5B0%5D=type%3Adataset

• 3. The Human Mortality Database

https://www.mortality.org/

• 4. Centers for Medicare & Medicaid Services

https://www.cms.gov/Research-Statistics-Data-and-Systems/Statistics-Trends-and-Reports/Medicare-Provider-Charge-Data/HHA.html

• 5. openFDA

https://open.fda.gov/tools/downloads/

• 6. National Cancer Institute

https://seer.cancer.gov/seertrack/data/request/

• 7. CLEF - Conference and Lab of the Evaluation Forum

http://www.clef-initiative.eu/dataset/test-collection

• 1. SNAP - Stanford Large Network Dataset Collection
• http://snap.stanford.edu/data/#twitter
• 2. ICWSM - International Conference of Something I'm guessing??!!
• https://www.icwsm.org/2015/datasets/datasets/
• 3. The Internet Archive
• https://archive.org/search.php?query=collection%3Atwitterstream&sort=-publicdate
• 4. Harvard Dataverse
• https://dataverse.harvard.edu/dataverse/gwu-libraries
• 5. Tweet ID Dataset
• https://www.docnow.io/catalog/

• 1. Duke
• http://www2.stat.duke.edu/~mw/ts_data_sets.html
• 2. Economics Web Institute
• http://www.economicswebinstitute.org/ecdata.htm

• 1. USGS
• https://gisgeography.com/usgs-earth-explorer-download-free-landsat-imagery/
• 2. Sentinel Science Data Hub
• https://gisgeography.com/how-to-download-sentinel-satellite-data/
• 3. SpaceNet on AWS
• https://spacenetchallenge.github.io/datasets/datasetHomePage.html