A large quantity of published data is available only in the form of plots and it is often difficult to extract numerical data accurately out of these pictures. There are several softwares available to aid this process, but most are either paid, difficult to use or lack some essential features. Also, many of the existing programs work only on a few specific operating systems and require installation by the user. Most programs only support 2D X-Y plots and so it is not possible to work with polar diagrams, ternary diagrams, microscope images or maps. With these issues in mind, WebPlotDigitizer was developed to be an easy to use, free of charge and opensource program that can work with a variety of plot types and images. This program is developed using HTML5 which allows it to run within a web browser and requires no installation on to the user's hard drive.
Distributed under the GNU General Public License Version 3.

Found on John D. Cook's blog
http://www.johndcook.com/blog/2016/04/20/how-to-digitize-a-graph/

Changed URL from http://arohatgi.info/WebPlotDigitizer/ 2019-12-30

Piksi a single-frequency GPS/GNSS receiver. It delivers RTK functionality for centimeter-level relative positioning in a 53x53mm form factor. The Piksi receiver supports a high-performance, onboard Digital Signal Processor (DSP) and a flexible correlation accelerator.

Features
   Centimeter-level relative positioning (RTK)
   10 Hz position/velocity/time solutions for fast updates
   Open-source software and board design (the FPGA firmware is closed source)
   Low power consumption: 500mW typical
   Small form factor:    53x53mm
   USB and dual UART connectivity
   Full-rate raw sample pass-through over USB
   3-bit, 16.368 MS/s L1 front-end supports GPS and SBAS signals

Libertine is a confined sandbox where you can install deb-packaged X11-based Ubuntu applications have have them run under Unity 8.

Issues with new ubuntu tablet
Asked by Paul Harmsworth on 2016-04-22

Modifying the virtual keyboard of the Terminal application on Ubuntu touch.

In order to factor (relatively) large semi-primes (i.e. semi-primes larger than 150-bits), you should (probably) just ask YAFU (Yet Another Factoring Utility, https://github.com/DarkenCode/yafu) to try to factor the number for you in parallel using a highly-optimized number field sieve such as GGNFS (GPL General Number Field Sieve) or SIQS (Self-Initialising Quadratic Sieve). By using YAFU I was able to factor a 302-bit semi-prime in a little over half an hour , as opposed to over the course of 72 minutes using Sage’s Quadratic Sieve (QS).

Found on
http://www.zeit.de/wirtschaft/2016-04/ttip-usa-eu-antiamerikanismus-freihandelszone-campact

Coding style can survive compilation. Interesting study where programmers were de-anonymized with fairly high success rates from the binary code of their programs.

KaTeX is a fast, easy-to-use JavaScript library for TeX math rendering on the web.

Fast: KaTeX renders its math synchronously and doesn't need to reflow the page. See how it compares to a competitor in this speed test.
Print quality: KaTeX’s layout is based on Donald Knuth’s TeX, the gold standard for math typesetting.
Self contained: KaTeX has no dependencies and can easily be bundled with your website resources.
Server side rendering: KaTeX produces the same output regardless of browser or environment, so you can pre-render expressions using Node.js and send them as plain HTML.
KaTeX supports all major browsers, including Chrome, Safari, Firefox, Opera, and IE 8 - IE 11. A list of supported commands can be on the wiki.

Ubuntu Linux binaries can be used under Windows 10.