BlocksQBF is a generator for random QBFs in QDIMACS format. It is an implementation of the random model described in "Hubie Chen, Yannet Interian: A Model for Generating Random Quantified Boolean Formulas. IJCAI 2005: 66-71". In the resulting QBFs all clauses have the same length and the number of literals taken from a quantifier block to appear in a clause is constant for each clause.
BlocksQBF is released under GNU GPLv3. See also file COPYING that is part of the distribution.