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Count document text and prepare client invoices

VoiceDrop sends ringless voicemails in your own voice and follows up by SMS.

Engineering worksheets that mix formulas and explanation

A notepad calculator with variables and calendar expressions

Natural-language calculation beside short notes

Molecular-biology quantities with visible formulas

Count text and set writing goals

Compare, count and clean text in one suite

Arithmetic, finance and practical calculation worksheets

Formula calculators with selectable input units

Scientific and everyday calculations with units

Desktop unit conversion with custom conversion definitions

Metric and imperial conversion with reference charts

An audio-programming system for instruments and effects

Financial management across ledgers, billing and group reports

Unit conversion organized by physical and everyday categories

AP exam prep with study guides, flashcards, quizzes and mock exams.

Detailed Korean lessons from reading basics to advanced grammar.

An interactive periodic table with property and isotope views

Fossil collections, taxa and literature in a searchable reference

Technical data and calculations for engineering study

Unit conversion across everyday and specialist dimensions

Engineering formulas organized by discipline and quantity