This page lists some development environments that were used or recommended before.
The following SAP development environments were recommended in the past. SAP no longer actively supports or distributes them, but in theory they can still be used.
SAP Web IDE is a web-based development environment that is optimized for developing OpenUI5 complex apps using the latest innovations, developing and extending SAP Fiori apps, developing mobile hybrid apps, and extending SAP Web IDE with plug-ins and templates.
SAP Web IDE can still be used if you have a productive SAP Business Technology Platform global account and have activated SAP Web IDE there.
It is no longer possible to access SAP Web IDE via a SAP BTP free tier account.
It is recommended to use SAP Business Application Studio instead. See App Development Using SAP Business Application Studio.