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
platform layer for node.js
generate model layer codes of your application for Parse.com
Simple MySQL Abstraction Layer and mysqli_ result wrapper
A design-focused abstraction layer over Mithril