Time Decaying Bloom Filter
Much like a bloom-filter except keys inserted decay over-time.
The configuration is identical to github.com/igrigorik/bloomfilter except you have two extra options, time and count. The TTL of any given key is time * count.
There is much more to say!
But this is version 0.0.1. I'll write more about it later. (And commit some tests and what not.)