In summer I will be able to spend some time on ThunderSync development.
Feature list for version 1.3, derived from own ideas as well as user input:
- Filter: list of properties to include/exclude from comparison (“don’t care” list)
- possibility to just export/import all contacts
- toolbar button
- possibility to use one big vCard file for all contacts
- IMAP-stored attachments as external target
- separate dialog for vCard v2.1 interpretation (usage of quoted-printable, folding,…)