3) DIIGO

DIIGO or Digest of Internet Information, Groups, and Other stuff an online internet tool helps with various things.  Diigo can help with bookmarking, researching, reading, browsing, annotating, storing, organizing and sharing information online.  It is a great tool for those who go on the web to research and read.  Diigo helps with organizing, taking notes, saving pages, and bookmarking websites online. 

Here are some great things you can do with Diigo:

• Read and browse online and use annotation tools such as digital highlights and sticky notes.
• Build personal library in the cloud.  Links, pages, pictures will always be safe to retrieve again.
• Organize and share your information as much or as little as you want.

You can sign up for free and access its services.  With the free plan, you have unlimited bookmarking.  But, for a fee you can have full access and unlimited plan of bookmarking, cached pages, and highlighting online.  Signing up is very simple as well as how the website is organized.  It has simple features and very helpful step-by-step directions.