Well as far as I know Czechoslovakia wasn't in debt after commies ended. Well except lost 40 years they took from nations of Czechoslovakia.
IIRC Yugoslavia and Poland were indebted. So much that allmost all at the time considered Yugoslavia as too indebted country.
Polish foreign debt in convertible currencies doubled in the 1980s. It grew from about US$ 20bn in 1980 to more than US$ 41bn at the end of 1988, and this in spite of repayments which amounted to about US$ 20bn over this period. It must be stressed that this was possible owing to a sustained trade balance surplus between 1982 and 1989 as well as to the positive transfer balance. At the same time however, the positive trade balance exerted an inflationary pressure. In 1990, it will be negative again, or at least the government's economic programme assumes so. Apart from the dollar debt, Poland's debt expressed in transfer roubles grew considerably in the last decade. At the beginning of 1990 it was Rb 5.6bn. This debt is almost entirely with the Soviet Union.
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.822.5141&rep=rep1&type=pdf
From the mid-1970s the Polish government embarked upon a strategy of economic development, through using credits from western banks to fund investment projects and raise living standards. Boosted by the flow of petrodollars, western banks were offering pro-western countries in the third world, and relatively autonomous governments in Central-Eastern Europe (CEE) (e.g. Poland and Romania), cheap loans. Although it was envisioned that these loans would help Poland to modernise its industrial sector and produce high quality consumer goods, the credits tended to be spent on supporting old industries, increasing salaries and importing raw materials and products from the west. This brought a partial increase in economic growth, but also resulted in the balance of trade deficit shifting from a surplus of 451.2m zloty in 1971 to a deficit of 8.9m zloty in 1975, with foreign debt growing from $1.2bn to $7.6bn during the same period.
...
Between 1982 and 1989 Poland only paid an average of 20-30% of its required debt repayments. Poland’s indebtedness had made it increasingly dependent upon western banks and financial institutions. In 1986 Poland joined the IMF and was required to introduce a series of structural reforms in order find resources to pay its debt.
http://www.cadtm.org/IMG/pdf/public_debt-2.pdf
Yugoslavia took on a number of
International Monetary Fund (IMF) loans and subsequently fell into heavy debt. By 1981, it had incurred $18.9 billion in foreign debt.
[29] However, Yugoslavia’s main concern was unemployment. In 1980 the unemployment rate was at 13,8%,
[28] not counting around 1 million workers employed abroad.
[31] Deteriorating living conditions during the 1980s caused the Yugoslavian unemployment rate to reach 17 percent, while another 20 percent were
underemployed. 60% of the unemployed were under the age of 25.
[16] By 1988 emigrant remittances to Yugoslavia totalled over $4.5 billion (USD), and by 1989 remittances were $6.2 billion (USD), which amounted to over 19% of the world's total.
[35][36] In 1988 Yugoslavia owed $21 billion to Western countries.
[37]
https://en.wikipedia.org/wiki/Econo...f_Yugoslavia#Collapse_of_the_Yugoslav_economy