Is there a plugin to organize post alphabetically and..

What I really want isn’t just to alphabetize. I have that already, but an index at the top of each page showing a-z with each post listed similar to that used on https://www.archive.org/details/feature_films to allow visitors to browse by title. I had one such plugin, but it generated a huge index that was useless because it indexed every word almost. I only want to index post titles. I have 150 posts already and growing..
Any suggestions?
Thanks
https://filmnoir.comuv.com/movies/