The Unitful.jl package is licensed under the MIT "Expat" License:
Copyright (c) 2016: California Institute of Technology and other contributors.
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Portions borrow from EngUnits.jl, which is (c) 2016: Daniel Høegh. Unitful.jl's fastmath implementation and tests draw heavily on those found in Julia.
Neither the name of the California Institute of Technology (“Caltech”) nor the names of its contributors (and/or sponsors) may be used to endorse or promote products derived from this software without specific prior written permission.
Andrew Keller (original package author, assigning his copyright to California Institute of Technology) acknowledges the support of an IQIM Postdoctoral Scholarship (Institute for Quantum Information and Matter, an NSF Physics Frontiers Center, NSF Grant PHY-1125565).