I use -
1) Google webmaster tools
2) Google keyword planner
3) WordPress SEO by YOAST (for WordPress sites)
4) IBP (a paid tool to promote business).
5) Small SEO Tools.

Google service is the best i think.

Quality Links are not less then seo tools

Hi,
I am Rajesh .working at mind riders Technology.
Google Webmaster
Google Analytics
Google Trends
Google Keyword Planner
Open Site Explorer.
and Keywords

I use Alexa and Moz's Open Site Explorer, as well as Google Analytics

While doing SEO it is very important to use the best tools, there are having different tools to perform the various methods of SEO.
Resources help us to perform our task more efficiently, like tracking traffic coming to your website, checks the rank of a website, to check the competitors of your website, for searching the keywords.
The name of these tools are:-
Google Keyword Planner
Google Analytics
Openlinkprofiler
Wordstream
Google Adwords
MOZ
SEO Quake

I use Google webmaster, keyword planer, Google Analytics

Adwords, Moz, SmallSeoTools, GTmetrix, HootSuite, SEO Quake ToolBar, WayBack Machine, Chrome Developer Tools.

up cho thớt nhé

Google Web master tool
Google Analytics tool
Keyword Planner
SEO Moz tool
Copyscape
Alexa
back link watch
Woorank
Long Tail Pro

I use google webmaster tools, keyword planner, and page rank tool.

Some of the best SEO tools that you must use are:

1. MOZ-The finest tool for analyzing a website completely
2. Google Webmaster- It helps to index the complete website
3. Google Analytics- It assist to check the traffic of a website
4. SEO Quake- SEO Quake shows data on traffic, links, social shares, on-page keyword optimization and more.
5. Keywordtool.io- With this tool one can search keywords related to the niche of his/her website easily.

I Use google analytics, webmaster tools, a hrefs, SEO profiler....

Google Webmaster
Google Analytics
Google Trends
Google Keyword Planner
Open Site Explorer
XML Sitemap
Copyscape

Google Web master tool
Google Analytics tool
semalt
ahrefs
scrapebox - think it can be used in seo
and adwords keyword tool