Вообще стабильная 40, но 40.1 транковая. И я использую и фрипаскалисты используют как правило транковую потому что именно она загружена в OnlinePackageManager.
Ну и да, развивается вроде. Но я в том же OPM видел форки synapse... Возможно у авторов синапс нет желания его пилить... Вижу в планах вебсокеты у них были
Synapse wishlist
Encode/Decode for DNS Packets
SNMPv3 AUTHPRIV DES and AES
WebSocket Protocol (RFC 6455)
Redirects handling (like Indy's idHTTP.HandleRedirects := true;)
IRC client
Delphi8 support (Current D8 support is only experimental. I not plan to finish it! Lukas)
Fuller demonstration code of how to encode a MIME attachment and attach to an oubound message. Present demos seem only to deal with decoding. (dittos on this request)
DHCP Server (tweetyarg@hotmail.com 092004)
LDAP Server (tweetyarg@hotmail.com 092004)
Free Pascal compilation using native free libraries instead of proprietary libc (I've done it once using Free Pascal libraries included in Debian Linux. vovic-at-smtp-dot-ru) (Done in latest version.)
IMAP4 Support (Exists long time ago. Lukas)
Support for Mac OS X, at least on the Intel platform. I read Eon Clash's ATerm project had started using Synapse on Mac intel, maybe you can officially “take over” the effort. Thanks. ;)
D2009 unicode support.
Try use synapse in win7 and DNS functions dont work. win7 build 7100
MLSD command support in FtpSend
HTTP Send → add referer (Exists HTTP.Headers.Insert(0,'Referer: ');)
* Android support