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OpenTaxSolver (OTS) is a free, open source program for calculating Tax Form entries for Federal and State personal income taxes. It automatically fills out and prints forms for mailing, with auto-fillout of government PDF forms available for supported forms.
calcurse is a calendar and scheduling application for the command line that keeps track of events, appointments and everyday tasks. It includes a configurable notification system, a customizable curses-based interface and command line options for filtering and formatting appointments, making it suitable for scripts.
MathPortal is a mathematics website offering step-by-step online calculators and solvers for topics including polynomial equations, rational expressions, systems of equations, matrices, complex numbers and analytic geometry. It also provides math lessons, formulas and tests. The site states it was designed by mathematician Miloš Petrović, who wrote the calculators, lessons and formulas. A paid homework help service is mentioned.
MatrixCalc is a web-based matrix calculation tool. It performs matrix operations including addition, multiplication, inversion, determinant and rank calculation, transposition, diagonalization, row echelon form conversion, exponentiation, LU decomposition, QR decomposition, and singular value decomposition. It also solves systems of linear equations with step-by-step solutions. Users can input decimal fractions, mathematical expressions, matrix literals, and use built-in functions for calculations.
Hybrid is a Qt-based frontend for other tools that convert most input formats to common audio and video formats and containers. It is intended for advanced users, not for amateurs needing a wizard-like interface, and offers job/queue-based processing, profiles, an integrated bitrate calculator and chapter and subtitle support.
An online generator that writes dating profiles from a few quick answers and user-supplied keywords, intended to help fill the free text field on online dating sites. The site also offers an opening message generator, an excuse generator and a love calculator, and forms part of the Masterpiece Generator set of text tools.
dut is a disk usage calculator for Linux. It produces an ASCII-art disk usage tree, counts hard links accurately, has a configurable output format, and allows setting the maximum depth of files shown via a command-line argument.
Heynote is a dedicated scratchpad for developers that functions as a large persistent text buffer divided into blocks. Each block can have its own language mode for syntax highlighting and auto-formatting, and math blocks serve as calculator scratchpads. Multiple note buffers can be created and organized into directories, and inline images can be pasted, resized, and annotated. It is available for Mac, Windows, and Linux.
LibreOffice is a free, open source office suite developed by a community and a project of The Document Foundation. It includes six tools: Writer for word processing, Calc for spreadsheets, Impress for presentations, Draw for diagrams and 3D illustrations, Base for databases, and Math for formulas. The project offers no-cost downloads and community assistance rather than technical support from the foundation.
microMathematics Plus is an open-source Android scientific graphing calculator and function plotter oriented around worksheets. It enables users to perform mathematical calculations in naturally readable form, create interactive formula collections, edit mathematical identities live with high accuracy, and store documents containing formulas, plots, text and images. The app includes no ads, trackers or telemetry, supports common mathematical operations and SI and non-SI units, and works on smartphones and tablets in portrait and landscape modes.
An interactive playground and graphical semantic calculator for modal propositional logic. Users add states and transitions to build models and enter formulas using notation such as []A for necessity and A for possibility.
Publish or Perish is a software program that retrieves and analyzes academic citations from multiple data sources. It calculates citation metrics including total citations, paper count, and h-index, with results viewable on-screen, copyable to clipboard, or savable to various output formats. The software includes a detailed help file with search tips and metric explanations, and supports use cases such as tenure applications, job interviews, literature reviews, and bibliometric research.
Apache SINGA is an Apache Top Level Project focused on distributed training of deep learning and machine learning models. It supports data parallel training across multiple GPUs on a single node or across different nodes, automatic gradient calculation, and loading and saving ONNX format models. Models trained with SINGA can be queried as stored procedures in an RDBMS.
SpeedCrunch is a free, open-source high-precision scientific calculator licensed under the GPL. It features a fast, keyboard-driven interface that displays results as users type, with a scrollable input history, customizable syntax highlighting, and an optional on-screen keypad. The calculator supports over 80 built-in mathematical functions, user-defined functions, variables, calculations with up to 50 digits of precision, complex numbers, numeral bases, unit conversions, and includes a library of over 150 scientific constants and common formulas. It is available for Windows, macOS, and Linux in multiple languages.
A tool for exploring subreddit similarity. Users enter a single subreddit to calculate the most related subreddits, or add and subtract multiple subreddits to find subreddits most related to their combination.
Video-Tutor.net provides a listing of videos on algebra, trigonometry, precalculus, calculus, general chemistry, physics, organic chemistry and statistics. It also offers final exam videos, course intro videos, video playlists, test prep videos, formula sheets and a membership program.
A web tool that calculates the total length and duration of YouTube playlists. It supports custom playback speeds, video ranges, progress tracking and watch schedule planning. Users paste a playlist or video link and analyze it to see total duration at multiple speeds. Private playlists are not accessible; unlisted playlists work with a direct link.
