According to the answers in this comparison question, there's no technical difference between the core PostgreSQL engine and Postgres Plus server from EnterpriseDB. The developer license is only $95/seat.
Their development tools look quite attractive and that cost might be worth it to get increased productivity even if you then deploy the open source version. Has anyone tried this and run into problems?
The only development tools I see there look an awful lot like pgadmin III, which is free software (both in terms of money and freedom).
Were there other development tools you were referring to?
