Who helped the north in the Civil War?

Answer 1

If you're asking about other countries... nobody.

The Union regarded the matter as a purely internal affair and did not seek outside assistance. All they really wanted was for other countries not to intervene on behalf of the Confederacy, and for the most part they got that, so in a sense it might be possible to say that Britain and France (the most likely allies of the Confederacy) "helped" the north by not helping the south.

The Confederacy had hoped to forge an alliance with Britain and France. While those countries were somewhat sympathetic and British ships, at least, made some efforts to circumvent the Union's blockade of southern ports, ultimately both countries realized that it was unlikely that the Confederacy would survive, and the political costs of having supported it would be high.

Answer 2

Yes, President Lincoln helped the North.