It's been a while, so here's a few more:

Trace Flag: 9481

Purpose: Use when running SQL Server 2014 with the default database compatibility level 120. Trace flag 9481 forces the query optimizer to use version 70 (the SQL Server 2012 version) of the cardinality estimator when creating the query plan.

KB Article: http://support.microsoft.com/kb/2801413

First Added: SQL 2014

Versions: SQL 2014

Trace Flag: 2312

Purpose: Use when running SQL Server 2014 with database compatibility level 110, which is the compatibility level for SQL Server 2012. Trace flag 2312 forces the query optimizer to use version 120 (the SQL Server 2014 version) of the cardinality estimator when creating the query plan.

KB Article: http://support.microsoft.com/kb/2801413

First Added: SQL 2014

Versions: SQL 2014

Trace Flag: 101, 102

Purpose: Troubleshoot merge replication performance issues

KB Article: http://support.microsoft.com/kb/2892633

First Added: SQL 2005

Versions: SQL 2005, SQL 2008, SQL 2008 R2, SQL 2012

Trace Flag: 849

Purpose: SQL may display memory corruption and recovery errors

KB Article: http://support.microsoft.com/kb/2967651

First Added: SQL 2005

Versions: SQL 2005, SQL 2008, SQL 2008 R2, SQL 2012, SQL 2014

Trace Flag: 2453

Purpose: Allows the query optimizer to use information about the number of rows inserted into a table variable in order to select more efficient query plan

KB Article: http://support.microsoft.com/kb/2958429

First Added: SQL 2012 SP2

Versions: SQL 2012 SP2