I did a non-scientific poll of what your favorite online Bible study websites are, back some time ago. I think the last post was message #958 on December 11, 2020 (ack! I've found out that the old adage is true: the older you get, the faster time does
seem to go by). Thanks to all of you who participated.
(Someone posted a message stating that they wondered why I didn't include online versions of
desktop apps. The reason is simple: it was just not in the purview of the poll. Anyway, he posted online versions of two desktop apps: Biblia.com, and the Tercarta Bible. I commend them to you.)
There is a new site that I ran across that I wish to add to the list. It is the
Bible Truth Library. It is helpful, and has some nice, unique features.
This website is sectarian. I do not say that pejoratively, only to make you aware that the supplementary articles, books, etc. will reflect the viewpoints of one particular denomination (in this case, it is that of the Plymouth Brethren). But I think that you will find that many--if not most--of those supplementary "helps" will be helpful to you, regardless of what denomination, if any, you belong to.