Google Spreadsheets and Python
I love Google Sheets. It is so much more powerful than 99.9% of the users appreciate. Here is how I use it at my day job as head of PM at New Relic:  - Fetch deals closed and lost hourly from Salesforce
  - Fetch for each of our 14k+ paid accounts usage metrics using our Insights product
  - Pull both items into a nice color-coded business dashboard that is near realtime
  - Send said dashboard out as a PDF to a bunch of stakeholders daily/weekly
  - Save PDF snapshot into Google Drive so I can easily pull up historical reports

If you haven't tried out Google App Script and supercharged your spreadsheets, give it a shot. It's also basically the only way the engineer in me gets to code much these days, so I have fun with it too :)PS: Google Sheets is definitely much slower for pure spreadsheets than Excel, no question about that. But by using cloud-based JavaScript + custom code, I can often work around that issue by writing functions that process the data quickly and report on what I need. Ultimately I end up getting much more out of it than Excel.