I am currently playing with Symbaloo. This is a web-based program that allows you to curate links to websites and organize them. You can even set it as your home page. You can have multiple tabs for content. There are pre-made Symbaloo mixes as well.
I have created a home mix, for frequently used sites, Chrome extensions, and other web tools we use (Plickers, Quizlet, Trello). I have also started creating mixes for the way I organize our class topics: Infants, Toddlers, PreK, etc). Within a mix page, you can also highlight groupings of links with common themes.
While all of this is very exciting, I am torn. Yes, this would make it much easier for my students and myself to use the internet for research, it also creates a false environment that students will not have in the future. However, there is a Google Search bar in the middle of the home mix page, so they can break out of the mix if they want to. I think I will introduce this tool in the second semester to experiment and get student feedback. It isn't difficult to set up, and you can easily edit it.