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

How to Connect to DB2 With SQL Developer. The Oracle SQL Developer tool can connect to databases other than Oracle, including MySQL, Microsoft SQL Server and DB2. The SQL development environment ...

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.

NEW YORK (AP) — Tech behemoth Oracle has agreed to settle a class action lawsuit for $115 million over allegations that it tracked consumer activity both on and offline.