Interoperable Europe Portal Licensing Assistant

Mozilla Public License 2.0

MPL is a reciprocal (or copyleft) licence that is interoperable and - to a certain extend - compatible with other licences, even copyleft or proprietary. OSI states it is supported by a strong community. The recipient must make the source code for any of distributed changes available under MPL, but can combine the MPL software with proprietary code, as long as the MPL code is kept in separate files. Version 2.0 is, by default, compatible with LGPL and GPL version 2 or later and with the EUPL (and the reciprocate is true in this last case, since MPL is listed as compatible by the EUPL). You can distribute binaries under a proprietary licence, as long as you make the source available under MPL.  Jurisdiction fixed where the defendant maintains its principal place of business. MPL is one of the reciprocal licences to be used (authorised) by French administrations. 

European Union Public Licence, Version 1.2 (EUPL)

Official Licence of the European Union (EC Decision,  part of European law). The licence is interoperable (no restrictions on linking in order to facilitate the integration of multiple components), reciprocal (third parties distributing improvements or derivatives must publish and provide back the modified source code), share alike and compatible: no global relicensing permitted, but the source code could be reused in other projects under "similar" copyleft or weakly (moderately) copyleft licenses GPL/AGPL, EPL, LGPL, MPL, OSL, CeCILL, LiLiQ. EUPL covers SaaS / network distribution. EUPL covers "the Work" (software and ancillary data). Original in 23 EU languages. Replaces EUPL-1.1 for works "Licensed under the EUPL" without specifying licence version, or adding "or later". Applicable law and court: licensor seat in EU (or specific additional agreement), otherwise Belgium. Support from the Interoperable Europe Portal community. Free legal support provided.

GNU Lesser General Public License v3.0

The Free Software Foundation (FSF) produced LGPL for libraries. Works made by using the covered software could be distributed under any licence. Distribution of derivatives (code modifications) must be done under LGPL. Reverse engineering must be allowed (= a general permission in EU law). FSF assimilates static linking to producing derivatives (which is not the case in EU law when made for interoperability).

Apache License, Version 2.0

Apache-2.0 is a permissive licence. For OSI it supported by an important community of developers. You can do what you like with the software, as long as you include the required notices. Compared with the MIT, recipients receive a patent licence from the contributors of the code. Applicable law / competent court are not specified

MIT License

MIT is the most recommended permissive licence: short and very popular (probably the most used worldwide). OSI states it is supported by a strong community. Basically, you can do whatever you want as long as you include the original copyright and licence notice in any copy of the software/source. Another version MIT-0 does not mention the obligation of including the copyright notice. MIT is one of the permissive licences to be used (authorised) by French administrations.