Excel is a popular spreadsheet program that can be used for data analysis. It has many built-in functions and tools for data manipulation, such as pivot tables, charts, and formulas. Excel is a user-friendly and accessible tool for basic data analysis and visualization. 

SQL (Structured Query Language) is a programming language used to manage and analyze relational databases. SQL can be used to extract, filter, and sort data from large databases. It's a powerful tool for data analysis, especially for large-scale projects and complex data structures. 

Python is a popular programming language used for a variety of purposes, including data analysis. It has many libraries and modules specifically designed for data analysis, such as Pandas, NumPy, and Matplotlib. Python is a versatile tool for data analysis that can be used for both simple and complex projects. 

Tableau is a data visualization tool that allows users to create interactive and dynamic visualizations of their data. It has a user-friendly interface and a variety of pre-built templates and charts. Tableau is a great tool for data analysis and presentation, especially for visual learners.