Calculus tools I have found helpful

[Saladsamurai]

for checking partial fractions, integrals and systems of equations

Partial Fractions (http://calc101.com/webMathematica/partial-fractions.jsp#topdoit)
Integrals (http://integrals.wolfram.com)
Matrix solver (http://www.gregthatcher.com/Mathematics/GaussJordan.aspx)

Have fun!

Mentors, if there is a better spot for this, feel free to move it there!

[Shukie]

Cheers, the integrals one is helpful for me.

[CasualDays]

I wish I would had this when I took calculus :bugeye: