Something I had omitted to mention on this list!
PipeDream is now released under the Mozilla Public License 2.0 (MPL) so is open source and completely free.
A copy of the MPL may be downloaded from http://mozilla.org/MPL/2.0/
PipeDream Tutorial and Reference Guides are also released under the MPL.
PipeDream Examples are licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
To view a copy of this license, visit: http://creativecommons.org/licenses/by-sa/4.0/deed.en_GB
PipeDream is hosted in a subversion repository on riscos.info.
Fireworkz will also be Open Source Real Soon Now...
Enjoy!
Stuart