The table below specifies the more or less concrete short-to-mid-term plans:

Needless to say, all this is heavily subject to change.

Nearly all applications are available on Windows as dual 32/64-bit installers (which automatically install the edition matching the operating system) and as 32- and 64-bit portable editions.
The exception is the Delta Framework application, which will remain available only as a 32-bit installer for the foreseeable future.
The Delta Framework application is behind the times in several other respects as well, such as:

• MIDI I/O handling.
• It is 'pre-mountainutilities.eu', thus links to the old Mountain Utilities web site.
• It doesn't provide advanced setup/desktop management yet.

The table below specifies the general plans for all applications, concerning the availability of manuals and the availability on macOS and Linux.

macOS:
Apple has started deprecating 32-bit macOS applications, such as the four Mountain Utilities applications coming in 32-bit macOS editions (as specified in the table below).
Unfortunately, the Lazarus programming language, used to create these four applications, doesn't support the 64-bit macOS interface ("Cocoa") fully yet.
Therefore work on 64-bit editions of these applications can only start once Lazarus does support Cocoa fully.
It is uncertain when this will be the case: perhaps in 2019?