noun
development kit
Computing term for a set of tools and resources used to create software or hardware applications.
このゲームの開発キットは無料でダウンロードできます。
The development kit for this game can be downloaded for free.
SDK (Software Development Kit) is a common English abbreviation; 開発キット is the Japanese equivalent, often used interchangeably.
Compound of 開発 (development) and キット (kit), a straightforward loanword adaptation.