Hosting git repositories -- Gitolite allows you to setup git hosting on a central server, with very fine-grained access control and many (many!) more powerful features.

OWASP ModSecurity Core Rule Set (CRS) Project (Official Repository)

Authentication, authorization, traceability and auditability for SSH accesses.

NAT Slipstreaming allows an attacker to remotely access any TCP/UDP services bound to a victim machine, bypassing the victim’s NAT/firewall, just by anyone on the victim's network visiting a website

Created by Jin Qian via the GitHub Connector

[SUNSET] Initiate consistent EBS snapshots in Amazon EC2

Kills all TCP CLOSE_WAIT connections

Delete expired EBS snapshots in Amazon EC2. Install on Ubuntu with: sudo add-apt-repository -y ppa:alestic && sudo apt-get update && sudo apt-get install -y ec2-expire-snapshots

A Perl interface to the Twitter APIs

Converter from GeoLite2 country database to legacy GeoIP CSV, for use with xtables-addons

Postfwd plugin for blocking international spam botnets based on geographical location of IP addresses used to login to postfix via sasl.

Collection of postfix related tools