Banjo tablatures can be found in the tablature archive at Banjo Hangout. According to Banjo Hangout, the archive contains almost 6000 tunes and songs, all available legally, free of charge and without any sort of membership requirement.
The tablature archive at Banjo Hangout provides a variety of tunes and songs for both bluegrass and clawhammer style banjo players. All of the tabs on the archive are contributed by Banjo Hangout's members and do not violate copyright laws.
The archive features tabs in a variety of formats, but the most common use the TableEdit program. TableEdit is proprietary software and requires a fee for use. TableEdit's makers provide TEFview, a program that allows the viewing and playback of TableEdit tabs, free of charge.