Most Importent Links For SEO

How to Identify Website Technology
Use these links:-

http://builtwith.com/
http://w3techs.com/sites
http://guess.scritch.org/

Website Review, Audit Report & Make Error free Website
Use these links:-

http://gtmetrix.com/
http://www.woorank.com/

Competitive link research, Explore Backlinks, anchor text, and more for free.
Use these links:-

http://www.majesticseo.com/
https://ahrefs.com/
http://www.opensiteexplorer.org/
http://smallseotools.com/backlink-checker/

Unique content checker.

http://smallseotools.com/plagiarism-checker/

Submit Web site url and Get Index & Crawl 

https://www.google.com/webmasters/tools/submit-url?pli=1

A1 Sitemap Generator
Download A1 Sitemap Generator and make xml site map for unlimited pages.

http://www.microsystools.com/products/sitemap-generator/

Increase alexa rank & Boost Website Traffic

http://www.alexaboostup.com/

Increase Facebook Likes & Followers

http://addmefast.com/

Create free logo for company

http://www.freelogoservices.com/