The Glottolog Data Repository
The Glottolog data repository is the place where the data served by the Glottolog web application is curated. But the repository also provides an alternative way to access Glottolog's data locally, and possibly even locally customized by forking clld/glottolog.
Languoids
Data about Glottolog languoids (languages, dialects or sub-groups, aka families) is stored in text files (one per languoid) formatted as INI files. The directory tree mirrors the Glottolog classification of languages.
References
The Glottolog bibliography is curated as a set of BibTeX files, which are merged into a single reference database for each release/edition.