"The choice between buying a home and renting one is among the biggest financial decisions that many adults make. But the costs of buying are more varied and complicated than for renting, making it hard to tell which is a better deal. To help you answer this question, our calculator takes the most important costs associated with buying a house and computes the equivalent monthly rent."
Hi! I’m Mike Bostock, creator of D3.js and a former graphics editor for The New York Times. I do data visualization, design and open source. AMA! : dataisbeautiful
Data wrangling tool Trifacta aims to ease analysis pain | Computerworld
Another free desktop tool, connected to cloud for updates (they call it "hybrid")
Enterprise version is not free, and it can connect to Hadoop and other data sources.