Two databases to identify listed and unlisted late roman coins.
First, nummus-bible-database including a search engine and RIC references, that lists late roman coinage from AD313 to AD476. Currently more than 18800 LRC listed. Note that you can contribute to improve it with your own collection.
(https://www.forumancientcoins.com/numiswiki/images/newban11.gif) (http://www.nummus-bible-database.com/)
Then, siliques.fr, a siliquae database including a search engine for late silver coinage from AD337 to AD476. Currently 1285 sliquae listed in.
(https://www.forumancientcoins.com/numiswiki/images/GRATIEN-RIC27c_2.jpg) (http://siliques.fr/)
Once again, for those who like Late Roman Coins, the Guillaume's (Dardanvs) Valentinian site is not really an identification site, but information an pictures included in allow to identify most of this emperor coinage.
Click on picture below
(https://www.forumancientcoins.com/numiswiki/images/vrt10.jpg) (http://collection-valentinien.ier.overblog.com/)