Unity 5.5.4f1 download files

Unity Editor Download Assistant

Windows Download Assistant
Mac Download Assistant

Component Installers Windows

Unity Editor (64-bit)
Unity Editor (32-bit)
Linux Target Support
WebGL Target Support
Android Target Support
AppleTV Target Support
iOS Target Support
Mac Target Support
Metro Target Support
Windows Store (IL2CPP) Target Support
Samsung TV Target Support
Tizen Target Support
Standard Assets
Example Project
Documentation

Component Installers Mac

Unity Editor
Linux Target Support
WebGL Target Support
Android Target Support
AppleTV Target Support
iOS Target Support
Samsung TV Target Support
Tizen Target Support
Windows Target Support
Standard Assets
Example Project
Documentation

MonoDevelop

MonoDevelop for Windows
MonoDevelop for Mac

Additional Resources

Unity Android Remote
Unity Remote Source
Unity Cache Server
Builtin Shaders
Unity iOS Remote