Bloom-golomb is a project mainly written in C, it's free.
Base code for Golomb-compressed Bloom filters
This provides the basic code for encoding and decoding counting bloom filters with a Golomb code. Technically a Rice code, since it only supports divisors that are powers of two. From this base, you can make a compressed Bloom filter without much additional trouble.
To determine the length of the compressed form, there is a function
bloom_compressed_bits(int x, int M) which will return the number of
bits in the Rice-compressed representation of x, where M is a power of
two. Use this to determine how big an array to allocate for the
compressed values.
You can use bloom_compressed_bits_nibbles() on an array of 4-bit
nibbles to get the number of bits after compression. FIXME: have this tell the intervals, not the numbers themselves.
FIXME: expand on this as the code expands.