Here's a concise, useful "story" summarizing the reality of that search and what you can actually do today: The Hunt for Oracle Developer Suite 10g (Released 2004)
A developer needed to maintain a legacy ERP system built on Oracle Forms and Reports 10g. They typed into Google: "Oracle Developer Suite 10g download" Oracle Developer Suite 10g Download- - Google
It looks like you're trying to locate a useful story or guide about downloading , likely from a Google search result. Here's a concise, useful "story" summarizing the reality