Visualize JSON data in graphs
“a command-line tool for querying, shaping, and reformatting data files in various formats including CSV, TSV, JSON, and JSON Lines.”
Great breakdown of which types of visualizations to use for data.
Mockaroo lets you generate thousands of rows of realistic test data in CSV, JSON, SQL, and Excel formats.
“an arena where you can match your data science skills against a global cadre of experts in statistics, mathematics, and machine learning. Whether you’re a world-class algorithm wizard competing for prize money or a novice looking to learn from the best, here’s your chance to jump in and geek out, for fame, fortune, or fun.”