Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.
Flourish - Powerful, beautiful, easy data visualisation
Price Tracker by Relbis Labs - Price Tracker is a command-line tool for monitoring the prices of productsFeaturesTracking prices and availability of products.Tracking Amazon Kindle books.Displaying products information in a terminal.Exporting data into Excel and YAML files.
The Data Visualisation Catalogue - Reference tool for data visualisation
Pricy - Amazon price watch
CodeAnalogies - Visual explanations of web development topics