Which licence do you use for your open source projects?

I tend to prefer Apache 2 as I would like attribution as well as protection from liability.

AGPL or GPL3.0 make businesses nervous. Like not even allow you to download it sometimes (if they don't have decent lawyers)!

That gets in the way of people adopting it, as businesses don't want to accidentally open source their secrets. It totally makes sense for something like dev.to to use AGPL but might prevent adoption for libraries that could be hidden away behind the scenes.

At DEV we use the copy-left AGPL license which enforces that users of our software must also open-source their code and publish any changes.

Part of our aspirations as a provider of transparent social media is that anyone who uses our software must live up to the same transparency.

If/when we release more lower-level library-style software we'd release that under MIT so that it could be used in more different contexts.

I'm intrigued by some of the novel licenses which have restrictions on the basis of ethics or commercialization, and while I'd definitely experiment with those on personal projects, it's hard to be an early adopter of exotic licenses and do so with a lot of confidence that it holds up if challenged on any of its merits.

I would say each License has a purpose, and you should take that into account choosing some for a project.

I'm gonna try to summary the main Licenses I used depending on the purpose of the project.

When:

• GPL and alike? When you aim to create a communty. GPL forces forks to disclosure the source code and you are able to merge back enhancements. So, as a communty, you put what you create first, preventing third party to take advantage of your work and don't contribute back.
  • When AGPL? When your type of software is a web application. For example, dev.to is a communty that creates a web application.
  • When LGPL? When you are creating a "Library", you want the enhancements to be shared, but you would like close sourced projects to use your library.
  • MPL has become more popular this days I think. mozilla.org/en-US/MPL/. I'm contributing to a project that has this license and I'm happy.

Why do I try to contribute to GPL alike licensed projects? Because I want my work to be for the communty and protected to be taken advantage of and not being contributed back.

• Apache-2.0 or BSD alike? When you want to achieve adoption but you don't mind others do a private fork. Scenario? You aim to create enterprise software, and you want what you are creating to win as much as adoption as you can. You probabily want to achieve a high user base so then you can a) sell consultancy for that product b) win some competitor by software popularity.

I think Apache-2.0 is more popular for companies that aim to drive their business by open-source product. Apache-2.0 only restricts that you cannot reuse the brand. I think...

• MIT. It's suuper permissive, you allow others fork, reuse the naming, ... only prevents the next:

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.

When I use MIT? for some libraries and minnor projects like Katas. Software that I will not dedicate a lot of effort, that I don't aim to create a community around it, or that I am not aiming to get a lot of adoption to then create a business around it.

My 5 cents about licensing, of course it's quite opinionated and there are more purposes. I just tried to give an inside of what I think, I might be wrong!!!, that those licenses can be used for.

I hope it helped you ^_^

I like MIT, but I am at the same time growing more and more fond of the hippocratic license as it also emphasizes that the source code can't be used in violation of UNs universal declaration of human rights.

Most of my projects are under the BSD 3-clause license. It's pretty close to MIT, but with the additional that the name cannot be used without consent (hard forks must be renamed).

However, for Orchid, a bigger project with more at stake, I chose LGPL 3.0. It's functionally GPL 3.0, but has a special exception for use as a library. So companies are free to distribute their apps which contain LGPL libraries without disclosing their source, unlike GPL. For me, this gives the project the protection and collaboration benefits of GPL from OSS consumers, while not scaring off business consumers.

Depends on the project.

If I intend for something to have a mostly educational tilt, I lean on the Mozilla Public Licence 2.0. The boundaries are at the file, so if someone else wants to incorporate the MPL-licensed stuff into their stuff, the whole does not need a relicensing; only the MPL-licensed parts have to remain that way and distributed under those terms.

Otherwise, I prefer the three-clause BSD licence. I warmed up to this after I started getting involved with the BSD communities, where there is very much a don't-reinvent-the-wheel attitude; the BSD licences allow for that sort of thinking on a wider scale. Unlike the operating system projects, however, I actually have the energy to respond and want to know who wants to use my or the project's name in derivative works. Again, the boundaries are at the file.

For ham radio stuff, GPLv2 for any user-facing (ie not a library) stuff. We continue to have problems (although fading, thankfully) of code and implementations released under proprietary terms in a community and service where openness is required by regulation. Libraries, see above.

Oh, yesterday i landed in that page, and i can't remember how! but definitely it was super helpful! (specially the 'Bring your lawyer' part, in 'I don’t want to choose a license.')

Thanks for your reply!

I usually just choose MIT for my public repos

Not that I'd recommend it, but the most permissive license is the Cypherpunks Anti-License

MIT most of the time or BSD if I want credit when needed.