Except GPS logs, there are some free sources for mapping of Slovakia. This is just rough summary of them, more can be found at http://wiki.freemap.sk (in Slovak only).
Yahoo! Aerial Imagery
Cadastral map is public domain in Slovakia. Big part is digitized and accesible on-line.
Data from cadaster has no copyright as stated by Geodesy, Cartography and Cadastre Authority of the Slovak Republic. Communication with authority (in Slovak) is listed at http://wiki.freemap.sk/KatasterPortal
ATM address data & ref of VUB bank
As per written permission (email) we are allowed to use address data & id for approx. 500 (as of 2016) atm's operated by VUB bank for inclusion in OSM. Coordinates come from a source incompatible with ODbL therefore we are not entitled to use them. For areas in OSM with dense address data coverage this should still bring reasonable accuracy.
Tesco Stores shops
TESCO STORES SR, a.s. gave permission to use information about their retail shops in Slovak Republic, as published at http://www.tesco.sk/tesco-v-sr/obchody/. The permission is to use this data displayed on the website: name of the shop, type (like supermarket, hypermarket, department store, etc.), address, opening hours, contact information. There is no permission to use anything else from the underlying maps as those are from Google Maps. The email communication (in Slovak) is currently available on request from user aceman444.