Packagist is the main Composer repository. It aggregates public PHP packages installable with Composer.
Useful array methods in PHP
Decorates a callback with cache (OPCache, FS) with LOCK_EX on write
An extremely fast web scraper that parses megabytes of HTML in a blink of an eye. No dependencies. PHP5+
Peer to Peer Entropy Generator (or Random numbers generator with p2p seeding)
SipHash PHP implementation (-2-4 so far)
Allows converting numbers written in arabic digits to words in several languages. You can convert an integer between -infinity and infinity.