I'm the lead developer of TortoiseSVN. I joined the project in its very early stages when it wasn't even usable, and I've been working on it ever since.

Of course, I always appreciate kind donations:
http://tortoisesvn.net/donate_stefan Contributes to Gurtle, MailNoter, Subversion, TortoiseSVN, CommitMonitor, grepWin, StExBar, favIconizer, demoHelper, TrafficWatcher, and SVNProtocolHandler.

Contributes to Mercurial, GNU C Library, libvirt, gzip, e2fsprogs, libguestfs, openAIS, corosync, libgitcore, btrfs, LZMA Utils, XZ Utils, Device Mapper, linux-cluster, GNU findutils, GNU sed, LVM, oVirt, Linux Kernel 2.6, linux-davinci, GNU Emacs, linux-omap, util-linux-ng, gnulib, GNU Automake, GNU Autoconf, GCC, the GNU Compiler Collection, GNU Make, GNU Core Utilities, Git, CVS: Concurrent Versions System, Qpid - Open Source AMQP, GNU Parted, GNU Bison, cobbler, PolicyKit, Augeas, livecd-tools, Advanced Linux Sound Architecture (ALSA), FreeIPA, Perl, GNU idutils, Fedora Live Tools, virt-factory, and Cairo.

Contributes to phpMyAdmin.

Contributes to Venkman, Mozilla Fennec, MXR Cross Reference, extensiondev, DOM Inspector, SpiderMonkey, Persian Firefox, XULRunner, Mozilla Core, Mozilla Firefox, Thunderbird, Mozilla Calendar, SeaMonkey, ChatZilla, Mozilla Rhino, and Camino.

Contributes to Chromium (Google Chrome), Mozilla Core, and Mozilla Firefox.

Contributes to systemtap, btrfs, Openmoko, elfutils, linux-libc-kernel-headers, Netutils, linux-davinci, GNU InetUtils, gnulib, OpenVZ, OpenEZX, linux-omap, KVM, config, GNU Automake, Cygwin, GNU binutils, Fedora Packages, GDB, Gnu Hurd, GNU Diff Utilities, strace, GNU Emacs, GNU Autoconf, Linux Kernel 2.6, GNU C Library, and GNU Make.

Contributes to Bazaar Version Control, svnbook, OpenOffice.org, Apache Portable Runtime, Cvs2Svn, Subversion, GNU Emacs, CVS: Concurrent Versions System, ProducingOSS, and Puppet.