I searched the first page of google results and whois.net.
OpenCypher (no directly competing software, some music groups use this name. opencypher.com is taken and empty, but opencypher.org is available)
FreeCypher (no directly competing software, some music groups use this name, freecypher.com and freecypher.org are available)
SecureStore (no directly competing software, this is also the name of steel shipping container business. securestore.com and securestore.org are taken)
FileCypher (generic phrase. filecypher.com and filecypher.org are available)
Cypher Lock (is a generic term for a type of physical lock. whois.net says cypherlock.com is taken, but cypherlock.org is available)
Cypher Umbrella (no directly competing software, cypherumbrella.org and cypherumbrella.com are available).
Ditto for Crypto Umbrella .com and .org
Cypherguard.com is taken (empty domain), but cypherguard.org is not.
ArmadilloCrypt .com and .org are available
FileSeal .com and .org are available
CypherSafe .com and .org are available, but Microsoft Trademarked the name. Grrrr.