TM1 (formerly known as Applix TM1 and Cognos TM1) is a business intelligence and corporate performance management software developed by IBM. It is designed to help organizations plan, budget, forecast, and analyze their financial and operational data. TM1 is a multidimensional database that allows users to build and manipulate complex financial models and perform real-time analysis.

TM1 includes a web-based interface for end-users, and a model design studio for developers and power users. It also includes a set of Excel-based tools for data entry, reporting, and analysis. Additionally, it has a built-in programming language called TurboIntegrator, that allows for the creation of custom calculations, data loading and data transformation.

TM1 is widely used in financial planning, budgeting, forecasting, and reporting. It's known for its scalability and performance, and it allows for real-time analysis of large and complex data sets. It's commonly used in large organizations, and it's widely used in industries such as finance, healthcare and retail. IBM provides support and maintenance, and it's regularly updated with new features and functionalities.