org.apache.jmeter.functions
Interfaces 
Function
Classes 
AbstractFunction
BeanShell
CharFunction
CSVRead
EscapeHtml
EscapeOroRegexpChars
EvalFunction
EvalVarFunction
FileRowColContainer
FileToString
FileWrapper
IntSum
IterationCounter
JavaScript
Jexl2Function
JexlFunction
LogFunction
LogFunction2
LongSum
MachineIP
MachineName
Property
Property2
Random
RandomString
RegexFunction
SamplerName
SetProperty
SplitFunction
StringFromFile
TestPlanName
ThreadNumber
TimeFunction
UnEscape
UnEscapeHtml
UrlDecode
UrlEncode
Uuid
Variable
XPath
XPathFileContainer
Exceptions 
InvalidVariableException