libfaketime modifies the system time for a single application

List of resources related to LD_PRELOAD, a mechanism for changing application behavior at run-time

Inject a shared library (i.e. arbitrary code) into a live linux process, without ptrace

Turn IP sockets into Unix domain sockets

A simple LD_PRELOAD library to disable SSL certificate verification. Inspired by libeatmydata.

LD_PRELOAD rootkit

Undo what the last shell command did to the filesystem

Hackbrary to Hook and Augment X11 protocol calls

Memstop monitors available memory and waits until a configurable percentage of memory becomes available before allowing a program to start.

Universal extension framework for Linux applications

LD_PRELOAD library to bypass TLS certificate verification for debugging and testing

A library for creating mods for Kobo's eReader software, Nickel.

Open-source firewall for AI agents. Policy engine that audits and controls what OpenClaw, Claude Code, Cursor, Codex, and any AI tool can do on your machine.

My Kobo mods/hacks/tools which aren't patches and aren't in koboutils.

Make programs think their stdout is a tty / terminal.

Support fonts with double-width icons in xterm/rxvt-unicode/zsh/vim/…

Override time reporting in Linux processes (accelerate/slowdown games, test code involving timers/delays)

Proxy protocol v1 and v2 support via an LD_PRELOAD library

A simple Linux in-memory .so loader

ld_preload userland rootkit