Our open source project Camlex.NET and free online service for Sharepoint developers http://camlex-online.org now have Donate button. If you find it useful and would like to support development of the Camlex, you can now make donation with any reasonable amount of money via your PayPal account or by credit card.
Camlex was, is and will be free. But as we work over it in the free time and pay for the domain name of online version by ourselves, we will appreciate any donation which you will decide to make. It will help to improve Camlex in the future and make it more useful for Sharepoint developers.