WinDirStat is a disk usage statistics viewer and cleanup tool for various versions of Microsoft Windows.

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Hydraulic pressure is a force that exerted by a liquid onto a confined surface. When it is applied on a fluid in any confined area, the force is transmitted in all directions by the fluid leading the system to its operation. It is more powerful than pneumatic or mechanical pressure, due to which it is used in applications dealing with greater loads. A pressure guage is required to measure the pressure of the fluid. The formula to calculate hydraulic pressure is F = PA, where, F = force, P = pressure and A = area.

Example of calculation of the centre of mass of an image. (a) The original square image; (b)
A 12 x 12 (pixellated) version of the image so that the calculations are simpler to see (although for
the images proper in the study all pixels are used from the entire image); (c) The calculations. The
12 x 12 matrix shows the darkness or weight of each pixel (ie, 255 = black = heavy; 0 = white = light).
The table at the bottom show ri, the arbitrary horizontal distance of each pixel from the left-hand
side, expressed as pixel number, the summed mass of each column of pixels, mi, and the product of
mi and ri (mi.ri). At the end of each row are the sums of ri and mi.ri, which are used to calculate R,
the position of the centre of mass, which is at 6.1 pixels from the left-hand side. The table at the
right shows the equivalent calculations for the rows, with ri arbitrarily being the vertical distance from
the top row of pixels. The centre of mass for the image as a whole is 7.4 pixels from the top and 6.1
pixels from the left, and those positions are shown by the red and green dashed lines in (b), with the
intersection, shown by the white circle, being the centre of mass of the image.

public void Invert(ref Bitmap bmp)
{

BitmapData newData = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height),
ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);

int total_size = newData.Stride * newData.Height;
byte[] g_PixBytes = new byte[total_size + 1];
byte[] g_OutBytes = new byte[total_size + 1];

Marshal.Copy(newData.Scan0, g_PixBytes, 0, total_size);

for (int y = 0; y < bmp.Height; y++)
{

for (int x = 0; x < bmp.Width; x++)
{

int pix = y * newData.Stride + 3 * x;               //2D to 1D Array Formula

g_OutBytes[pix + 2] = (byte)(255 – g_PixBytes[pix + 2]);
g_OutBytes[pix + 1] = (byte)(255 – g_PixBytes[pix + 1]);
g_OutBytes[pix + 0] = (byte)(255 – g_PixBytes[pix + 0]);
}
}

Marshal.Copy(g_OutBytes, 0, newData.Scan0, total_size);

bmp.UnlockBits(newData);

g_PixBytes = null;
g_OutBytes = null;

}

//Simple image invert filter by C# programming language.

Ractangle Packer without Artificial Intelligence (AI) or Artificial Neural Network (ANN).

-2D(Width, Height) to 1D Array Formula = Y * Width + X

-Example of a 2D array with size:
Width = 20, Height = 50
-Example position(X, Y) in this array:
X = 15
Y = 35

-Representing this 2D position by a 1D Array:
–> Y * Width + X
–> 35 * 20 + 15
–> 715

Sumatra PDF is a free and open-source document viewer that supports many document formats including: Portable Document Format (PDF), Microsoft Compiled HTML Help (CHM), DjVu, EPUB, FictionBook (FB2), MOBI, PRC, Open XML Paper Specification (OpenXPS, OXPS, XPS), and Comic Book Archive file (CB7, CBR, CBT, CBZ).[3] If Ghostscript is installed, it supports PostScript files. It is developed exclusively for Microsoft Windows.

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Colormania is an advanced color picker utility, especially created for web-designers, graphic artists and application developers.

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7-Zip is a file archiver with a high compression ratio.

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Magnetic Pendulum without any power supply.