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Mathematics  Differentiation  Integration
On this page you'll find some math instructional videos of two people that can explain math very clearly and they also made quite a lot of videos. So, when you want to get a better understanding of mathematics, watch these videos or visit their site or Youtube channel. These are great math resources.
Further below on this page you'll find some tools that might be handy when you want to make a calculation or unit conversion. I've also included a working scientific calculator on this page.
Linear equation
Differentiation
Integration
More mathematics videos
http://www.mathtv.com/
http://www.youtube.com/user/MathTV
http://patrickjmt.com/
http://www.youtube.com/user/patrickJMT/
Education websites
http://www.khanacademy.org/
http://www.academicearth.org/
https://www.coursera.org/
http://xoax.net/math/index.php
Calculators  Unit conversion
Online calculators
http://www.metacalc.com/
http://my.hrw.com/math06_07/nsmedia/tools/Graph_Calculator/graphCalc.html
http://www.eeweb.com/toolbox/calculator
http://web2.0calc.com/
http://goodcalculators.com/graphingcalculator/
Graphing calculator  http://www.emathhelp.net/calculators/calculus1/onlinegraphingcalculator/
Integral Calculator  http://www.emathhelp.net/calculators/calculus2/integralcalculator/
Derivative Calculator  http://www.emathhelp.net/calculators/calculus1/derivativecalculator/
Graphical function calculators
Function Grapher is an easytouse software to create 2D, 2.5D, 3D function graphs, animations and table graphs. 2D Features: explicit, implicit, parametric, and inequality; Cartesian and polar coordinate systems; curve and animation; line plot; scatter plot; stem plot; step plot; curve smoothing. 3D Features: cartesian, cylindrical, and spherical coordinate systems; 3D curve and surface; animation; 3D surface based on table data; material and light. Ability to create color map, contour plot and vector plot. Ability to move, zoom in, zoom out and rotate graphs. Ability to save graphs as pgp file or bmp file. Ability to save animation as AVI file.
Function Grapher has the following features:
• Creating 2D function graphs, animations and table graphs
• Creating 2.5D function graphs, animations and table graphs
• Creating 3D function graphs, animations and table graphs
• Creating color map, contour plot and vector field
• Ability to set and modify the properties of coordinate graphs, animations and table graphs
• Ability to move, zoom in, zoom out and rotate the graphs in plot area
• Ability to save graphs as pgp file or bmp file
• Ability to save animation as AVI file
• Free Tools
Complex functions calculators
Visual Complex is a graphing calculator to create a graph of complex function. 3D function graphs and 2D color maps can be created with this grapher. You can input complex functions in the form of w=f(z) (where z=x+yi) directly before creacting graphs. Graphs can be copied and saved in the format of bitmap.Complex Grapher is a graphing calculator to create a graph of complex function. 3D function graphs and 2D color maps can be created with this grapher. You can input complex functions in the form of w=f(z) (where z=x+yi) directly before creacting graphs. Graphs can be copied and saved in the format of bitmap.
Visual Complex has the following features:
• Creating 3D graphs of complex functions
• Creating color maps of complex functions
• Ability to edit graph interactively
• Ability to copy and save graph as bitmap
Matrix calculators
Easy Matrix calculator is a calculator with which you can calculate several kind of matrix operations. You can download a free trial that you can try and use for 7 days or buy it.
Below is a screenshot of the program.
Scientific calculators
With Math Calculator you can calculate an expression, roots, extremum, derivateve, integral, etc.

Unit conversion sites and tools
http://converticious.com/
http://www.sooeet.com/
http://convert.francepropertyshop.com/
http://www.convertworld.com/en/
http://www.convertcenter.com/
http://www.peters1.dk/webtools/conversion.php?sprog=en
http://convert.francepropertyshop.com/
http://www.unitconverters.net/
http://www.metricconversions.org/
http://www.theconverter.co/
http://www.esbconsult.com/esbcalc/esbunitconv.htm
http://www.palasoftware.com/MathBoard.html (iPad/iPod/iPhone/iMac math training tool)
http://www.mathway.com/ (math equation solver)