saving sessions on Chrome [closed]
Not exactly a "session saving" but you can save the currently open tabs as bookmarks.
To do so, press Ctrl+Shift+D*, create a separate folder (e.g., Sessions > 2015-04-20) and hit Save. This way, you can save tabs for different dates in different folders.
*Alternatively, you can press hamburger menu at the right top corner, then go to Bookmarks > Bookmark open pages...
I think Session Buddy is doing what you are looking for.