"tools developed" is correct and usable in written English.
You might use it, for example, in a sentence such as: "Many new tools have been developed to facilitate the process."
Participatory rural appraisal techniques, which are tools developed to incorporate local knowledge into development practice, have been traced back to his theories on education.
To it, he brings the analytic tools developed by Marx and Freud.
Earlier this month Happy City launched a set of tools developed with the New Economics Foundation.
Now the technologies and tools developed by this multibillion dollar entertainment industry are making changes in the real world.
This was a watershed moment in mathematics that allowed all the tools developed in algebra to be applied to geometry.
As important as the study's findings, Dr. Earls said, are the measurement tools developed to uncover them.
It is an independent study by the university researchers utilizing research tools developed for a separate Nasa activity.
It is unclear – especially for analytics tools developed and sold by private tech companies – how exactly they even work.
NOT all such applications and tools developed were turned into full-fledged products.
They also used a suite of encryption tools developed by jihadis known as Asrar al-Mujahideen (Secrets of the Mujahideen), which was developed by al-Qaida.
But lately Hollywood has decided to take advantage of advances in copyright-protection tools developed by companies like Microsoft, Macrovision and RealNetworks known as digital rights management software.
