These programs are distributed in the hope that they will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Most are made available under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version, but see the License conditions for each individual program.
These programs are in the form of Web Widgets which execute within a web browser. They are coded in HTML, CSS and javascript.
In many cases the files may also be downloaded for local use in a web browser. This may require modification of the browser's security settings.
Information about most widgets can be obtained by clicking on the HELP buttons or on the blue help balloons.
Many of the simple calculators require the user to enter data and then press the RETURN or ENTER key.
Beat Meter can be used to measure the beat (MM) rate of a piece of music. It can also be used as a simple metronome and tuning device.
Direct Link or download the files for local use in your browser.
This is a web version of the DTMF Dial Widget.
Direct Link or download the files for local use in your browser.
EAN13 Barcode displays the barcode for an EAN13 number entered by the user.
Direct Link or download the files for local use in your browser.
The EAN13 Decoder displays the EAN13 number of a barcode image dragged onto the window.
FFT Display computes a Fast Fourier Transform of a function (in the time domain) specified by the user and displays the spectrum. A number of common functions can be selected from a menu.
Direct Link or download the files for local use in your browser.
IBAN Checker is a simple Widget which checks the format and checksum of an International Bank (IBAN) Number.
Direct Link or download the files for local use in your browser.
Magnifier II is a simple Widget which can display images. It has a magnifying glass which can show a magnified image of any part of the displayed image. It has support for World Files.
Direct Link or download the files for local use in your browser.
The PIN (De)Coder Widget provides a simple means of encrypting and decrypting four-digit PIN numbers.
Direct Link or download the files for local use in your browser.
Demonstrates animation using a railway signal object.
Direct Link or download the files for local use in your browser.
Last updated Wednesday, June 17, 2020.