Devised by James Madison, created a three-branch government with a bicameral national legislature (with two houses). The lower house would be elected directly by the people and the upper house would have representatives nominated by state legislatures. The greater the population of your state, the more representation you had in the houses.
Devised by Paterson, in response to the Virginia Plan for small states, that proposed a unicameral legislature where each state delegation would get one equal vote in that legislature. Members were appointed by the states and each state was represented equally in legislation.
A Grand Committee proposed a bicameral legislature with two houses. The House of Representatives consisted of members directly elected by citizens and represented the states according to their population. The Senate consisted of members appointed by state legislatures and represented the states equally (two senators per state).
The Electoral Compromise created the Electoral College to settle the dispute between the delegates who felt that the president should be popularly elected and those who feared that the electorate would not be informed enough to make that decision.
The Northern states who opposed slavery wanted to bring an end to the importation and sale of slaves while the Southern states felt that slavery was crucial to their economy. In The Slave Trade Compromise, Northern states, in their desire to keep the Union intact, agreed to wait until 1808 before Congress would be able to ban the slave trade in the U.S.
The Northern States Delegates felt that slaves should not be counted in representation because it gave the South more members and say in Congress and the Electoral College. The Three-Fifths Compromise determined that a slave ("other person" in the Constitution) would count as three-fifths of a person when calculating a state's representation.