I have made a program that converts all the problems in the program Dan Tutor Shortcut to Dan to SGF.

The program is sold by goplayer2006 on ebay (if the item in the link is sold, just request a new one from him). It is also sold under the name 围棋级位测试 6000题 from other sources. It is the easiest problem set I know of in digital form. The easiest problems are DDK level and the hardest strong SDK level. In case this feel familiar, some uf us discussed it a while back on gd here.

Link to converter tool:
http://dantutortosgf.sourceforge.net/

Thanks to forum member CnP for testing it.

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FusekiLibrary, an opening library.
SGF converter tools: Wbaduk NGF to SGF | 440 go problems | Fuseki made easy | Tesuji made easy | Elementary training & Dan level testing | Dan Tutor Shortcut To Dan

& thanks CarlJung for creating it!

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I am John. John-I-Am.