You can download Lazarus 1.8.4 which is accompanied by FPC 3.0.4 from this page.
Lazarus is cross platform and supported on various platforms. Choose your platform to go to the corresponding page:
For other downloads, check: The SourceForge Project page
It is recommended to use Sourceforge.net for all the downloads.
However, if you cannot access sourceforge.net, then you can use mirror links: