Groovy/Grails Tool Suite is an Eclipse-powered IDE for Groovy and Grails applications.
Ranked in these QuestionsQuestion Ranking
Pro Freely available
GGTS is freely available for use in development and/or internal business operations without any limitations whatsoever.
Pro Supports development in the cloud through Cloud Foundry
Being able to develop in the cloud means that developers can be distributed and data can be stored in the cloud. With a variety of databases available for use in the cloud, programmers will surely find a suitable solution.
Con Dismissed by Pivotal
Pivotal announced that it will fund the next two major releases of the Groovy and Grails through March 31st, 2015, after which it will no longer directly fund development on these open source projects.
Con Can be extremely resource intensive
High usage of resources lead to screen freezes and program crashes. The worst case is losing hours of work due to the program failure.