Top 4 Most Popular Formal Softwares | May 2024

1. F*

F* (pronounced F star) is an ML-like functional programming language aimed at program verification. Its type system includes polymorphism, dependent types, monadic effects, refinement types, and a weakest precondition calculus. Together, these features allow expressing precise and compact specifications for programs, including functional correctness properties. The F* type-checker aims to...... TpSort Score | 50,000,000

2. Isabelle

Isabelle is a proof assistant for writing and checking mathematical proofs by computer. It allows mathematical formulas to be expressed in a formal language and provides tools for proving those formulas in a logical calculus....... TpSort Score | 1,210,000

3. Coq

Coq is a proof assistant, which allows you to write mathematical proofs in a rigorous and formal way, and have them checked for correctness by the computer. It also allows programming with proofs of correctness for the code, and dependent types....... TpSort Score | 682,000

4. Agda

Agda is a dependently typed functional programming language. It has inductive families, i.e., data types which depend on values, such as the type of vectors of a given length. It also has parametrised modules, mixfix operators, Unicode characters, and an interactive Emacs interface which can assist the programmer in writing...... TpSort Score | 103,000