rqlite is a lightweight, open-source distributed relational database, with SQLite as its storage engine. v4.4.0 is now out and allows the Raft election timeout to be set.
You can download the release from GitHub.
I recently had a chance to speak about rqlite, the distributed, lightweight database built on SQLite, at the University of Pittsburgh Computer Science Club. It was a good evening as I spoke about distributed systems, the problems they solve, and how rqlite uses Raft to replicate SQLite.
You can find the presentation here.