Applications - What do you use?

What kind of applications do you guys use? (E-Trade) is my personal favorite.

 

Ms excel

 

Just simple calculator with + - / * function on my handphone.

 

IB TWS / EXCEL API
ThinkorSwim (Thinkscript)

http://www.market-topology.com/

 

Fully automated algorithmic trading with
IB/AmiBroker/Norgate/AmiBroker/Alera Portfolio Manager as
Broker/Backtesting/Data/TradeSignals/Execution Platforms.

 

Python, Numpy, Scipy, Matplotlib, API from a dozen crypto exchanges, IEXCloud for the free "real time" stock data and some other stuff.

 

Amibroker, javascript, perl, and Excel VBA.

 

Stata, R and Matlab of course - don't we all.
Then Bloomberg and Refinitiv for data and modelling.
Then PR Newswire for announcements
Oxford Economics for macro.

But...nothing beats MS Excel.

 

How would you use it?

 

How do you use it? Any examples?