I've put together a web page with script that converts between legacy Hebrew
encodings (fonts) and Unicode.
To date I have added support for the following legacy encodings:
(1) SPTiberian (and its relatives, SPDamascus, SPEzra)
(2) an ASCII transliteration scheme like that used on B-Hebrew.
This latter option may be useful for those of you B-Hebrew users who prefer
to read and write your Hebrew in Unicode.
More encodings will be included as time permits. If you want your favorite
font added, email me a table showing which character in your font maps onto
which Hebrew character.