If you want to install Oracle SQL Developer on your Windows computer for free, check if you meet the requirements and then go through the instructions mentioned here.

Oracle SQL Developer 1.1 offers read-only access to MySQL, SQL Server and Microsoft's Access, as well as full connection support for Oracle databases from Oracle 9i onward. The free tool is ...

If the Oracle SQL Developer crashing on startup on your computer, you can follow the solutions mentioned in this post to resolve the issue.