The Dev Toolbox is a group of applications, designed with making working with IPS easier, and to reduce overall production time. There are a total of 6 apps (well a total of 7, but the 7th one is required to be installed with any of the others, as it contains data and code the rest of the apps use to function).
These applications are being provided free of charge to the IPS developer community, but I ask if you find them useful or lifesaving, consider making a donation of any amount, to help ensure the future development of these fantastic tools.