Dictionaries and lexical bases

Semantic dictionary with senses and synonyms (BTB-Wordnet) – version 1 

BTB-WN
The Bulgarian BulTreeBank WordNet is available for online browsing here. It could be used to explore semantic relations between words and for spelling and meaning checks.

Bulgarian Valency Frame Lexicon ISLRN: 188-702-981-369-5
The Bulgarian Valency Frame Lexicon is composed of 9547 lexical entries organized by frames with 960 mappings to Princeton WordNet available in XML format. It is a treebank-driven resource of extracted valency frames from BulTreeBank. The frames were manually curated. The structure of the frames follows the BulTreeBank syntactic structure.
Valency Dictionary of Bulgarian 0.1

List of Intransitive Verbs in Bulgarian
If you use this resource, please cite the link.

Frequency List of Bulgarian Verbs
The list is lemma-based, but it reflects all the synthetic wordforms of a verb.
If you use this resource, please cite the link.

A Dictionary of Writing, Pronunciation and Punctuation of Bulgarian Language
Dimitar Popov, Kiril Simov, Svetlomira Vidinska. A Dictionary of Writing, Pronunciation and Punctuation of Bulgarian Language. (in Bulgarian)
Atlantis KL, Sofia, Bulgaria. 927 pages. October 1998.