Primarily used for software libraries, LGPL requires that derived works be licensed under the same license, but works that only link to it do not fall under this restriction. There are two commonly used versions of the LGPL.
Disclose Source. Source code must be made available when distributing the software. In the case of LGPL, the source for the library (and not the entire program) must be made available.
Library usage. The library may be used within a non-open-source application.
License and copyright notice. Include a copy of the license and copyright notice with the code.
Commercial Use. This software and derivatives may be used for commercial purposes.
Distribution. You may distribute this software.
Modification. This software may be modified.
Patent Grant. This license provides an express grant of patent rights from the contributor to the recipient.
Private Use. You may use and modify the software without distributing it.
Sublicensing. You may grant a sublicense to modify and distribute this software to third parties not included in the license.
Hold Liable. Software is provided without warranty and the software author/license owner cannot be held liable for damages.