pngquant is a command-line utility and a library for lossy compression of PNG images.

The conversion reduces file sizes significantly (often as much as 70%) and preserves full alpha transparency. Generated images are compatible with all web browsers and operating systems.

Writer2LaTeX is a utility that converts documents in OpenDocument format - in particular documents containing formulas - into other formats. It is actually a collection of four converters:

• Writer2LaTeX: converts documents into LaTeX 2e format for high quality typesetting.
• Writer2xhtml: converts documents into XHTML 1.0, XHTML 1.1, XHTML 1.1+MathML 2.0 or HTML5 with CSS2. This provides standards-compliant XHTML and brings your math to the web.
• Writer2BibTeX: is a companion to Writer2LaTeX that extracts bibliographic data from a document and stores it in BibTeX format.
• Calc2xhtml: is a companion to Writer2xhtml that converts spreadsheet documents to XHTML 1.0 or XHTML 1.1 with CSS2 to display your spreadsheets on the web.

This is a set of command line utilities for manipulating large tabular data files. Files of numeric and text data commonly found in machine learning, data mining, and similar environments. Filtering, sampling, statistics, joins, and more.

These tools are especially useful when working with large data sets. They run faster than other tools providing similar functionality, often by significant margins. See Performance Studies for comparisons with other tools.

They perform data manipulation and statistical calculations on tab delimited data. They are intended for large files. Larger than ideal for loading entirely in memory in an application like R, but not so big as to necessitate moving to Hadoop or similar distributed compute environments. The features supported are useful both for standalone analysis and for preparing data for use in R, Pandas, and similar toolkits.

From eBay.

AutoOut is an automated outlier detection and treatment tool that allows you to get better models with even better accuracy without writing a single line of code. With it's easy to use and simple interface you can detect and treat outliers in your dataset, that can help improve your final model.

Pngquant is a free, open source and cross-platform command-line lossy PNG compressor. It is based on a portable libimagequant library and is written in C99. It reduces the file size significantly by converting the PNG image to more efficient 8-bit PNG format and preserves full alpha transparency. As you may already know, 8-bit PNG files are often 60-80% smaller than 24/32-bit PNG files. The images compressed using Pngquant are fully-compatible with all web browsers and operating systems. Pngquant can compress one or multiple images at once.

CryFS encrypts your Dropbox and protects you against hackers and data leaks. It also works well together with other cloud providers.

A command-line tool to generate, analyze, convert and manipulate colors.

General information on the PrivateBin project.

Webmin is a web-based interface for system administration for Unix. Using any modern web browser, you can setup user accounts, Apache, DNS, file sharing and much more. Webmin removes the need to manually edit Unix configuration files like /etc/passwd, and lets you manage a system from the console or remotely. See the standard modules page for a list of all the functions built into Webmin.

I am not going to discuss why you need strong passwords. It is an open secret that strong passwords keep you relatively safer.

Generating strong passwords is something you can do on your own but putting all the combination of lower and upper cases, numbers, symbols can be a tiresome work.

But you need not worry. Linux has got you covered. We’ll see 5 best password generators for Linux that will ease the task for you.

Abricotine is an open-source markdown editor built for desktop.

Generate HQ poly wallpapers.

Example with fixed color/gradient:

WallGen is a small command-line utility that generates HQ poly wallpapers with only a few text arguments for inputs. Free and open source software.

rga is a line-oriented search tool that allows you to look for a regex in a multitude of file types.

rga wraps the awesome ripgrep and enables it to search in pdf, docx, sqlite, jpg, movie subtitles (mkv, mp4), etc.

rga (or ripgrep-all) is a command line tool to recursively search all files in a directory for a regex pattern, that runs on Linux, macOS and Windows. It's a wrapper for ripgrep, the line-oriented recursive search program, on top of which it enables search in a multitude of file types like PDF, DOCX, ODT, EPUB, SQLite databases, movies subtitles embedded in MKV or MP4 files, archives like ZIP or GZ, and more.

asciinema lets you easily record terminal sessions and replay them in a terminal as well as in a web browser.

Creates GPG encrypted, compressed backups; client-side encryption allows to upload the backup onto untrusted servers.

Encrypted backups with a clean and simple interface; easy to use and set up; possibility to mount the backup archive with FUSE and inspect it as a regular file system.

"Recursive directory listing command that produces a depth indented listing of files".