Some of my favorite coats of arms, sorted by category, some ideas of mine

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  China PRC
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  North Korea
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  Laos
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  Vietnam

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  Afghanistan
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  Angola
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  Belarus
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  Guinea-Bissau
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  Italy (not communist)
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  Mozambique
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  North Macedonia
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  Tajikistan
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  Uzbekistan

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  North Macedonia 1946-2009
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  Montenegro 1945-1993
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  Serbia 1947-2004
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  Indonesian Communist Party
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  Romania 1948
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  Soviet Union simple
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  Russia 1918-1920
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  Ukraine 1918
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  Uzbekistan 1931
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  Georgia/ Transcaucasian SFSR
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  Georgia 1921
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  Georgia 1990
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  Azerbaijan
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  Kirgizia 1936
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  Kirgizia 1937
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  Belize, surrounded
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  Cuba (socialist state)
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  Greece
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  Pakistan - Jasmine flowers
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  Portugal - olive branches
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  San Marino wreath of laurel and oak
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  Senegal - palm leaves
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  Somalia - palm leaves
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  Venezuela (declared democratic socialist state) olive branch and palm (maybe turn into SVG)

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  France (collar of the Legion of Honour, also medal has wreath)
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  Uruguay

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  Bangladesh - has wreath
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  Brazil national seal
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  Cape Verde (seal with some palm branches)
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  Japan Imperial Seal
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  Kazakhstan
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  Republic of Korea
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  Kuwait (bird as wreath)
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  Kyrgyzstan
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  Nicaragua (circular text)
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  Paraguay (obverse) has palm and olive branch
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  Rwanda - Sorghum, coffee tree, gear, square knot
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  Sri Lanka - rice stalks
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  Turkmenistan - octagram, wheat and flowers
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  United States - Great Seal

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  Barbados Presidential Flag
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  Brunei Sultan Flag
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  Brunei Sultan COA
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  Costa Rica 1840
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  Costa Rica 1848
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  East Timor 2002
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  French First Republic
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  Greece President
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  Guyana President 1992
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  Haiti 1807
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  Hungary military
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  Iran 1403-1907
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  Iran 1907
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  Latvia middle version
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  Malaysia Yang di-Pertuan Agong
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  Malta 1975-1988
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  Mauritius President
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  Burma 1974
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  Peru Coat of Arms on Flag
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  Spain 2nd Republic, civic crown
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  Spain 2nd Republic constitution, with cream scrolls
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  Tonga Parliament (based off COA)
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  Trinidad President

Note: Singapore's President has a COA, but unfree image on WP. /info/en/?search=File:Singapore_Presidental_Crest.gif

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  Artsakh
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  Republic of China/ Taiwan
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  Northern Cyprus
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  Western Sahara
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  Somaliland
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  South Ossetia
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  Transnistria