Masternode
Masternodes
In addition to a normal blockchain secured by mining nodes, Dash also has a network of servers to facilitate mixing and fast transactions. The servers run the dashd daemon and each one needs 1000 DASH of collateral. Interest is received for running the service. This is particularly attractive because the collateral can remain under full control of the user and doesn't need to be on the same server as the dashd' service is running one. This means you can use third-party hosted services such as masternode.me too with no risk of losing your collateral.
There are also many forks of Dash for which masternodes can be set up, most have lower entry-level and higher returns, but come with the disadvantage of being less reputable coins that could dump in value unexpectedly. A list of coin supporting masternodes along with the statistics can be found here. One such coin that's worth trying is VIVO which has a reasonably low entry cost of about 1BTC and an excellent return of 300%pa (about US$1600/month at current prices) and has an very easy to follow setup guide. A block explorer for VIVO can be found here.