PuTTY is recommended for system administrators, developers, network engineers, and anyone who needs to perform remote command-line operations on a computer or server using the SSH protocol. It is particularly useful for users who are working on Windows systems.
Optimizely is a lower cost entry tool for anyone looking to do website testing. While their pricing structure has changed over the years it still is a pretty cost effective solution. It is easy to get tests up and running within 5 minutes once you have code placed on your site.
I love the drag and drop features of Optimizely. It makes it very easy to make simple changes to do landing page testing for my paid search campaigns. It also frees up dev time for our web team. Also, The findings from Optimizely tests are so valuable for an end customer experience.
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
VWO - Use VWO to tweak, optimize & personalize your website with minimal IT help.
KiTTY - KiTTY is a fork from version 0.70 of PuTTY. It adds extra features to PuTTY.
AB Tasty - AB Tasty is an all-inclusive platform for conversion rate optimization, personalization, customer activation, and testing.
ConEmu - ConEmu-Maximus5 is a full-featured local terminal for Windows devs, admins and users. Get better console window with tabs, splits, Quake style, copy+paste, DosBox and PuTTY integration, and much more.
Google Analytics - Improve your website to increase conversions, improve the user experience, and make more money using Google Analytics. Measure, understand and quantify engagement on your site with customized and in-depth reports.