Reverse engineering
Open alternatives3
Ghidra is a free tool from the US National Security Agency for taking apart compiled programs and firmware to understand how they work. It is mainly for security researchers and professional analysts who study software for vulnerabilities or malicious code.
Has 4 of 5
How many people bookmarked its code on GitHub. It shows how popular it is, not how good it is or how well it replaces the app.
How hard it is to start using it. Easy: install it like a normal app, or use it in your browser. Advanced: you run it on your own server, use the command line, or it is a tool for developers.
Its code changed within the last year, so someone is still looking after it.
Does the whole job.
Ordered by how fully it replaces the app, Verified, setup and, when there are enough, people's votes.

Cutter is a free program for studying how existing software and firmware work by taking them apart without the original source code. It is aimed at security researchers and reverse engineers who analyze programs.
Has 2 of 5
How many people bookmarked its code on GitHub. It shows how popular it is, not how good it is or how well it replaces the app.
How hard it is to start using it. Easy: install it like a normal app, or use it in your browser. Advanced: you run it on your own server, use the command line, or it is a tool for developers.
Its code changed within the last year, so someone is still looking after it.
Does the whole job.
Ordered by how fully it replaces the app, Verified, setup and, when there are enough, people's votes.

ImHex is a free program for viewing and editing the raw bytes inside files, with tools to decode and inspect their structure. It is aimed at reverse engineers, programmers and anyone who needs to look closely at binary data.
Has 2 of 5
How many people bookmarked its code on GitHub. It shows how popular it is, not how good it is or how well it replaces the app.
How hard it is to start using it. Easy: install it like a normal app, or use it in your browser. Advanced: you run it on your own server, use the command line, or it is a tool for developers.
Its code changed within the last year, so someone is still looking after it.
Does part of the job.
Ordered by how fully it replaces the app, Verified, setup and, when there are enough, people's votes.