Does the country publish the lists of parties and/or candidates registered for elections online?

On presidential elections in Turkmenistan

Article 23
Publicity in the work of election committees

23.1 Election committees shall inform the citizens of their membership, location and the work they carry out, registered candidates for the office of the President of Turkmenistan and their biographic data, results of voting for each candidate and overall outcome of the elections.

Article 31
Registration of candidates for the office of the President of Turkmenistan

31.6 Centrizbircom shall, not later than on the fourth day following registration of candidates in the process of the presidential elections in Turkmenistan, publish in press a communication on registration with indication of family names, names, patronymics, year of birth and birthplace, place of work, position held (activity) and place of residence of each candidate.
 

On Elections of Deputies of the Mejlis of Turkmenistan

Article 22
Transparency in the work of election commissions

Election commissions shall inform citizens of their composition, location and of their work; about the registered candidates for deputy of the Mejlis and their biographical details, and about the results of voting for each candidate and the results of the election.

Article 31
Registration of candidates for deputy of the Mejlis

Not later than on the fourth day after registration of candidates for deputy of the Mejlis the district election commission shall publish a registration announcement in the press indicating the surname, first name, patronymic, year of birth, position occupied (occupation), and the place of employment and residence of each candidate for deputy of the Mejlis.

The Central Election Commission of Turkmenistan has an official web site though it publishes election results through the official media of Turkmenistan (newspapers, TV, radio). The list of candidates could be found in the online newspapers, referring to the decisions and announcements of the Election Commission (for example: http://www.turkmenistan.ru/ru/articles/36922.html)