My apologies on the support issues. The plugins that came with your site depend on if you purchased an authority site or a regular Niche Jet site. The authority sites have additional plugins added in comparison to the regular NJ site.
Sumome shouldn't have any conflicts with JLmailer. It's actually just for social sharing.
I have given a summary of each plugin below. But to get a full understanding of these plugins, you can look each one of them up on the wordpress official site. We only use ones that have been tested over time and have great ratings:
Here is the list:
3d tag cloud. - Gives a revolving tag cloud with the main topics of the site. It's in the sidebar, and is there to capture the attention of the visitor so they can see what the bulk of the content involves.
Facebook comments by Fat Panda - This plugin switches your regular commenting over to where any facebook comments made will show up on the site as well.
Fast secure contact form - This form is setup to where visitors can contact you if they have a question.
Genesis simple edits - Editor for the Genesis framework of the site.
Genesis simple hooks - another editor that you probably won't ever mess with. Depending on the child theme used, you may have to use this in order to take care of certain features, but we have made any edits to the framework that need to be done. So again, you won't really have to worry with these last two plugins.
Google Adsense and Analytics - Adsense plugin to put adsense on your site, and Analytics to track the visitors.
Related Posts by Sovrn - Adds links to posts that are related to the given post at the bottom of the article - and thumbnail images from the related posts.
Sumome - social sharing tab so people can display your site on their social media pages if they like the content.
W3Total Cache - caching plugin so data from site doesn't have to be constantly pulled from the database of the NJ site. Makes the site speed faster so there is a better user experience.
Wordfence Security - security plugin to prevent hacking, malware, and other attacks on the NJ site.