Meteor Astronomy is model layer for Meteor

PHP5 library that provides a filesystem abstraction layer − will be a feast for your files!

A mapping layer for the OData gem that integrates with ActiveModel.

A layer on top of the Selenium browser automation library.

Modern OpenGL wrapper, thin C++14 header-only layer on top of the OpenGL 4.5+ API

UI Layer for lonelyplanet.com

WFS Layer written in Javascript that runs on Node.JS

An physical layer LTE network simulator.

ruby persistence layer for CouchDB.

RobOptim Core Layer: interface and basic mathematical tools

A design-focused abstraction layer over Mithril

platform layer for node.js

generate model layer codes of your application for Parse.com

Simple MySQL Abstraction Layer and mysqli_ result wrapper