Apache Tuweni bundles applications, directly available in the binary distribution. You can download the binary distro on this page.
gossip application is an example showing how the Plumtree gossip implementation functions.
hobbits-relayer application showcases how to use the Hobbits protocol to pass messages between different networks.
scraper application discovers nodes running on discv5, reporting them to stdout as it goes.
eth-faucet application is an Ethereum faucet that runs alongside an Ethereum client. The faucet allows to distribute funds.
jsonrpc application is a JSON-RPC proxy that can cache, filter, throttle, meter and authenticate requests to a JSON-RPC endpoint.