The Collaborative International Dictionary of English v.0.48:

Freely \Free"ly\, adv. [AS. fre['o]lice.]
   In a free manner; without restraint or compulsion;
   abundantly; gratuitously.
   [1913 Webster]

         Of every tree of the garden thou mayst freely eat.
                                                  --Gen. ii. 16.
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         Freely ye have received, freely give.    --Matt. x. 8.
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         Freely they stood who stood, and fell who fell.
                                                  --Milton.
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         Freely we serve
         Because we freely love.                  --Milton.

   Syn: Independently; voluntarily; spontaneously;
        unconditionally; unobstructedly; willingly; readily;
        liberally; generously; bounteously; munificently;
        bountifully; abundantly; largely; copiously;
        plentifully; plenteously.
        [1913 Webster]

WordNet (r) 3.0 (2006):

freely
    adv 1: in a free manner; "the painting featured freely brushed
           strokes"