Description:

tla-switch Switches an arch project tree's current branch to another
branch, changing the actual source files to match (unlike the
builtin tla command tla set-tree-version)
tla-fork Makes a new arch branch forking off the current branch in a
project tree, and makes that the tree's current branch.
tla-cvs-sync Does bi-directional gatewaying of an arch branch with a CVS
branch.
tla-svn-sync Does bi-directional gatewaying of an arch branch with a
Subversion branch.
tla-update-ids Goes through a project tree, and automatically adds or updates
taglines and explicit id-tags.
tla-file-log Outputs arch changeset logs which affect a specified file.
tla-fix-changelog-conflicts Looks through a project tree for ChangeLog.rej
files (containing conflicts from merging changes to the
ChangeLog file), and tries to automatically fix them up, using a
simple rule.
tla-copy-changes Copies changesets from one arch branch to another.
tla-partner Runs a tla command using the "partner version" of a project tree
(defined by the contents of the file {arch}/+partner).

Some other handy commands include:

tla-changelogs-to-log Turns any changes in (GNU-style) ChangeLog files in a
project tree into a single log text appropriate for including in
a tla commit log.
tla-commit-merge Does a tla commit with a log text appropriate for a merge:
the Summary: line mentions the merged version, and the body is
the output of tla log-for-merge filtered through
tla-abbrev-merge-log.
tla-abbrev-merge-log A filter for the output of tla log-for-merge which
replace repetitive sequences of entries with an abbreviated
form.
tla-log-to-cvs-log Converts an arch changeset commit log into a compact form
suitable for including in a CVS commit log.
tla-fork-archive Forks branches from one archive into another.