Composer provided a suite of development tools to help develop Composer applications
- Playground
- VSCode plugin
- Yo Generators
- Embedded connector and runtime for easy unit testing of business networks
- cucumber steps for cucumber testing of business networks
Unfortunately Hyperledger fabric doesn't provide any real set of tools to help in the development of chaincode or client side applications. One thing they do provide over Composer is a set of typescript definitions so at least you can get Editor support when developing your applications if you plan to use typescript.
There are tools being developed outside of the hyperledger ecosystem which can be used to help you develop fabric applications, for example there is a yo generator-fabric package on npm as well as the IBM Blockchain Platform extension for VS Code which can be used for to help develop a hyperledger fabric application.