After installing Sloeber (the Arduino plugin for Eclipse), the software installation sites were deleted. This will prevent Eclipse from making updates to the installed plugins. These are the sites that I use with my Eclipse for PHP Developers setup which can be restored manually through Help -> Install New Software -> Available Software Sites.

  • Neon
    http://download.eclipse.org/releases/neon
  • The Eclipse Project Updates:
    http://download.eclipse.org/eclipse/updates/4.6
  • org.eclipse.e4.ui update site
    http://download.eclipse.org/releases/neon/201610111000
  • EGit P2 Repository
    http://download.eclipse.org/egit/updates-nightly/
  • LiClipseText p2 Repository
    http://www.liclipse.com/text/updates
  • Pydev p2 Repository
    http://www.pydev.org/updates/