There are more and more Agile Tools every day. Here is a list with links to enough info about each product to help you understand if it is worth researching more.
Product Free Version? Methodology Client Deployment
Acunote Yes Scrum Browser Hosted
Agilebuddy Yes Scrum Browser Hosted
Agilefant Yes Scrum Browser Hosted/Local
AgileSoup Yes Scrum Browser Hosted/Local
AgileTrack No XP Windows/Linux Hosted/Local
AgileWrap Yes Scrum/Kanban Browser Hosted
Basecamp Yes General Browser Hosted
Bright Green Projects Yes Scrum/Kanban Browser Hosted
ExtremePlanner No Scrum/XP Browser Hosted/Local
FindNerd Yes Scrum/XP Browser Hosted
Herogami No Kanban Browser Hosted/Local
IceScrum Yes Scrum/Kanban/XP Browser Hosted/Local
Jira + Greedhopper No Scrum/Kanban Browser Hosted/Local
Kanban Board Yes Kanban Browser Hosted
Kanban Tool Yes Kanban Browser Hosted/Local
Kanzen No Kanban Browser Hosted
LeanKit Yes Kanban Browser Hosted
Mingle No Scrum Browser Hosted/Local
OnTime No Scrum Browser Hosted/Local
Pivotal Tracker No Scrum Browser Hosted
planningpoker.com Yes Scrum/XP Browser Hosted
Project Cards Yes Scrum/XP Windows/Linux/Eclipse Local
ProofHub Yes Collaborative Browser Hosted
Rally Yes Scrum/Kanban Browser Hosted/Local
RedMine Yes General Browser Local
ScrumDesk Yes Scrum Windows Hosted/Local
ScrumWorks Yes Scrum Browser Hosted/Local
Silver Catalyst No Scrum/Kanban Browser Hosted/Local
SwiftKanban Yes Scrum/Kanban Browser Hosted/Local
TargetProcess Yes Scrum/Kanban Browser Hosted/Local
TeamPulse Yes Scrum/Kanban Browser Hosted/Local
tinyPM Yes Scrum Browser Hosted/Local
Trichord Yes Kanban Windows Local
VersionOne Yes Scrum/Kanban Browser Hosted/Local
Wrike No General Browser Hosted
XPlanner Yes Scrum/XP Browser Local
Yodiz Yes Scrum/Kanban Browser Hosted/Local