During 2013 Syncfusion have been releasing additional books in the series of Succintly. They cover a lot of development areas and are all free (PDFs).
Not only books are shipped free. Syncfusion offers also for Hobbyist the Essential Studio for JavaScript.
Per se it’s not free as You need to pay $ 1 for 1 license which is also valid for next offer.
Another offer for Hobbyist is the Essential Studio for WinRT (Windows 8.1)
The JavaScript Studio should attract Excel developers who develop so called Office Apps.
Anyway, I find it nice when a company like Syncfusion actually see the group of hobbyists.
Yes, I’m a full member of the Hobbyists group 😉
Happy Coding!
Dennis
VSTO & .NET & Excel 
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