completable-promise
CompletablePromise library allows to create a Promise instance that does not start its resolution upon its declaration.
rx-completable
Reactive Extensions - represents a deferred computation without any value but only indication for completion or exception.
completable-future
Emulate the behavior of CompletableFuture in Java for Promises, so you can hand off the Promise for someone else to fulfill in a cleaner way. Doesn't require you to immediately begin the work to complete the promise.
reduce-future
Reduce boils down a list of values into a single values. With reduce-future, you will able to reduce one array list that need execute async functions, joining the results on success callback.
