I am bookmarking few links I may need in future.

All my online bookmarks are never actually working 🙂

http://ubersuggest.org/

https://mural.ly

https://trello.com/tour

http://www.majesticseo.com/

https://ahrefs.com/

http://www.xml-sitemaps.com/ 

This seems to be generating good sitemaps, provided your site is well organized.

Check out http://www.traffictravis.com/

I just started exploring. Will update once I have more to add.