neosnippet.vim/autoload/neosnippet/snippets/markdown.snip

snippet link
abbr [link][]
    [${1:#:link_id}][]${2}
snippet linkid
abbr [link][id]
    [${1:#:link}][${2:id}]${3}
snippet linkurl
abbr [link](url)
    [${1:#:link}](http://${2:#:url})${3}
snippet linkemail
abbr [link](email)
    [${1:#:link}](mailto:${2:#:email})${3}
snippet linkurltitle
abbr [link](url "title")
    [${1:#:link}](${2:#:url} "${3:#:title}")${4}

snippet idurl
abbr [id]: url "title"
    [${1:#:id}]: http://${2:#:url} "${3:#:title}"
snippet idemail
abbr [id]: email "title"
    [${1:#:id}]: mailto:${2:#:url} "${3:#:title}"

snippet altid
abbr ![alt][id]
    ![${1:#:alt}][${2:#:id}]${3}
snippet alturl
abbr ![alt](url)
    ![${1:#:alt}](${2:#:url})${3}
snippet alturltitle
abbr ![alt](url "title")
    ![${1:#:alt}](${2:#:url} "${3:#:title}")${4}

snippet emphasis1
abbr *emphasis*
    *${1}*${2}
snippet emphasis2
abbr _emphasis_
    _${1}_${2}

snippet strong1
abbr **strong**
    **${1}**${2}

snippet strong2
abbr __strong__
    __${1}__${2}

snippet code
abbr `code`
    \`${1}\`${2}