User Interface Frameworks
Development of Bootstrap was initially started by Mark Otto and Jacob Thornton, two employees of the social network Twitter, to provide some consistency in development of internal tools within Twitter, under its original name of Twitter Blueprint. After a short time, other developers within the organisation joined in with its development and in August 2011 it was released as an open source project. Today, both Mark and Jacob are still involved in the development of Bootstrap, along with a small team of other core developers and a large community of contributors.
How Tos and Useful Stuff
Like Bootstrap, Foundation was first released as an open source project in 2011 and is developed by Zurb, a product design company, along with many contributors from its community. Initial development of Foundation, originally known as ZURB Style Guide, started internally within Zurb in 2008 as a means to speed up work for their clients. It was renamed to Foundation in 2010, before version two was released as an open source project in September 2011.