There are few tools that can help you to write good content.
Grammarly : To help you to correct the grammar mistakes
Copyescape : To help you to know that the content written by you is genuine and published nowhere earlier.
Copyblogger : To help you with content writing tips, tutorials.
Hope this helps!
Well, there are many tools for content writing. But if you are truly passionate about your content then all you need is Grammarly to avoid spellings and grammatical mistakes. And original content won't be the plagiarized one. Still, if you need any tool to check plagiarism, then use tools like Copyescape. I think these two are enough. And for content inspiration use Google. For any help with your content, feel free to contact the team of Softpulse Infotech.