OK, but when we researched a new flight planning system, FW'z was an independent competitor touted by IATA as being amazing.
Sabre acknowledged that their flight planning system was inferior to Jeppesen, however they offered a wonderful replacement that was in "production"... Obviously they decided that it was more beneficial to buy FW'z than to continue writing their own software in Poland.
Finally, if you ask Sabre sales people about a standalone flight planning system, they wont sell it to you, they want you to buy the complete suite, and will promise total integration
Mutt