[Rapzid]

I use LiteIDE to good effect. It has a few kinks to work out but is generally everything I need. The Go intellij plugin is supposed to be good too from what I hear.

Packages are shared across projects in the same gopath, you could run separate gopaths for isolation.

[jacques_chester]

I've found the Go plugin for IntelliJ to be flaky around the things I most want. Particularly refactoring. It would also be nice if it borrowed the behaviour of the sublime and vim plugins and fmt'd code on save.

[egeozcan]

I'm using Go only for experimenting. IntelliJ worked great so far and I'm saying this as a person who works with Visual Studio + Resharper in his day-job.