What is tools a seoer really need?

Hi everyone,

We are developing a website about seo tools. It has 4 main tools: keyword suggestion, keyword rank checker, site explorer and auto spinner now. We are going to make some new tools. Therefore, we really need to listen your idea.

Information about our 4 main seo tools:

Keyword suggestions
+ Suggesting searches related to your keywords
+ Estimating the search volume for keywords

Auto spinner
+ Creating content with HTML and BBCODE text editor
+ Using available data or your data to auto spin your content
+ Posting your content on Blogger and WordPress

Site explorer
+ Checking Google Index, PA, DA for a large number of sites
+ Comparing your site with competitors and classifying forums or sites to get backlink

Keyword rank checker
+ Checking ranks of hundreds of keywords in the top 100
+ Managing and storing your keywords efficiently

P.s: the title of my post should be "What are tools a seoer really needs?"

check for errors on sites and if neg seo is being done to a site