The best alternatives to Marmoset are CodeMyUI, Stanza, and Code Pad. If these 3 options don't work for you, we've listed a few more alternatives below.
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Haggle — Pre-Demo Leads: No name or email, but interested to buy
Snippy lives in your menu bar so you can search through a collection of text snippets for quick copying and pasting into Xcode, text editors or your E-mail client.