Everything in the catalog

Reads a CSV in the page and reports each column's type, gaps, spread and outliers, then drafts a data dictionary to copy.

Keyboard-only questionnaire that maps an outage to SEV1 through SEV4, lists the rules that fired and drafts the channel message.

Animated support-desk model using Erlang C that shows waits exploding near full utilisation and how much an extra agent helps.

Portuguese-language 3D viewer for caffeine with ball-and-stick and space-filling models plus structure and property notes.

Builds an inventory health dashboard from an Amazon CSV with lead time and months-to-order forecasting.

Scores an Amazon listing for title case and length, keywords, USP, grammar, emotional tone and competitor comparison.

Loads an Amazon ad report and flags campaigns against target ACOS, minimum clicks and minimum orders across two periods.

Builds several product title variants from basic info, keywords, USPs, benefits and attributes, with a keyword shuffle.

Scans a review export for guideline problems such as incentives, profanity, external links, private info and medical claims.

Animates blocked matrix multiplication, highlighting which cells of A, B and C are active and the accumulator state.

Japanese-language tool that picks a year and class, then places students in a seating grid at random.

Adjust the parameters of a Cobb-Douglas production function and compare output across settings with a short economics note.

Korean-language educational DCF calculator: enter yearly free cash flows, discount rate and growth to get enterprise value.

Double pendulum simulation with adjustable starting angles and graphs of angle and energy.

Japanese-language step-through of the edit distance (Levenshtein) table for two strings.

Sandbox where emoji particles orbit placed bodies (planet, sun, moon) with gravity, damping and trace controls.

Particles bounce in a container; change the temperature and watch wall collisions and a bounce-count chart.

Chinese-language calculator that plots an improved Gaussian antenna beam model from beamwidth and main/side-lobe parameters.

Rounds a number such as a vocabulary size up to the next GPU-friendly multiple and shows the difference.

Fits a line to housing data by square footage, bedrooms or age, shows slope, intercept and R-squared, and predicts a price.

German-language form that builds an .ics calendar event from start, end, title, description and location, with copy or download.

Loads an image from upload, URL or paste and lets you change its color saturation.

Supply and demand curves that shift when you raise or lower either one, so you can see the equilibrium move.

Animated k-means run on a random point set, with data reset and speed control until the clusters converge.