You can get the latest version of OsmAnd free from listed app stores.
OsmAnd produces every day multiple Ready-To-Use builds which allows keep track of new features and participate in OsmAnd contributions (translation process).
OsmAndMapCreator can be used to create any maps supported by OsmAnd yourself.
Release notes of next coming Android version which currently available as Beta.
Release notes of next coming iOS version which currently available as Beta.