Google Analytics

Google Analytics is the best analytics that is available for free. It can be very powerful to see the statistics of your blog. Many bloggers use it just to see how many people visited their site.
You can run track links, split tests, track conversions, goals and get live insights of how your users interact with your site.
Blog Link Magic

The very simple Blog Link Magic WP Plugin lets you monetize ALL your existing content in moments.
It’ll Change/Update old/broken links across your whole site, and Create your own list of links to import/export to other sites.
I have a full review of Blog Link Magic here.
ThirstyAffiliates

ThirstyAffiliates is for bloggers using WordPress. But really all affiliate marketers of any kind that use WordPress. Because their CMS are suited to use ThirstyAffiliates to aid in their affiliate marketing monetization.
It adds links to your WordPress editor so you can add affiliate links. You make the links in a dashboard.
Spin Rewriter 10

Developed by Alex Sustar. Spin Rewriter 10 is a web-based article spinning software. That allows you to quickly rewrite paragraphs of text to use in marketing articles that help improve your Search Engine Optimization (SEO).
This technique of rewriting text is also known as spinning and it allows you to stay away from getting penalized by Google for content duplication or plagiarism.
As you can imagine, any form of copying others’ content can be a very costly mistake resulting in penalties from Google and other search engines and in some extreme cases getting into litigation.
AFFIEMBED

AffiEmbed is a brand new, easy-to-use WordPress plugin that allows adding products from the top 5 online marketplaces to your WordPress posts or pages with just a few clicks of your mouse.
With AffiEmded Your Subscribers Can Now Embed Affiliate Products from Amazon, AliExpress, eBay, Walmart & Best Buy on Any WP Posts and Pages in Minutes… and of course without the need for complicated APIs. I’ve made a full AffiEmbed Review Here.
OutreachPlus

OutreachPlus is one of the best email outreach software on the internet. It allows you to Customize your cold emails and make them feel and look personal and send outbound sales emails as well.
With OutreachPlus you can automate sending personalized emails to affiliates to achieve higher response rates.