Jenkov.com is owned and operated by the Danish software development company Jenkov Aps
which is again owned and operated by me (Jakob Jenkov).
Jenkov.com is mostly about software right now, but I might add related topics in the future. The
reason this website is about software is because I am a software developer, I run a software
development business, and I like software as a hobby too. In the video below I talk a bit
more about why I find software fascinating.
Though the company and website is owned and operated by "just" me, the content of this website
is not the result of my work alone. The tutorials have been read and commented by countless
developers, and the open source software used, reviewed, commented, and shaped to the needs
of thousands of users. Therefore, in some places on this website I write "we", and in other
places I write "I", depending on who is making the concrete statement: I, a few colleagues
and I, a community and I.
The tutorials.jenkov.com subsite contains tutorials on various software development
related topics. Whenever we feel we have something useful to say it will be published
Butterfly Components is a lightweight component suite for Java application development.
It is meant to be an elegant lightweight alternative to the bigger and heavier
Butterfly Components are open source and released under the
Apache License 2.0, meaning they are free to use in both open source and commercial
Please note that Butterfly Components quickly reach a maturity state, after which
no further development is done on them. They may seem dead - but most of the time
they are just stable.
I have other open source components than Butterfly Components: JSP Prize Tags and Mr Persister ORM.
These are not included in Butterfly. Perhaps they will be in the future, or perhaps Butterfly
will get equivalent alternatives based on the experiences gained from these projects.