diff --git a/services.mdwn b/services.mdwn
index ad7ac7747ea8ea974f4cb314cb002fd5e59b3301..1d1b0ac661e1d2f2fb418243672bdb32de6fd28a 100644
--- a/services.mdwn
+++ b/services.mdwn
@@ -71,6 +71,7 @@ Infostructure
 -------------
 
 * [DNSCrypt](https://www.dnscrypt.org/).
+* DNS-over-TLS like [hddemux](https://0xacab.org/dkg/hddemux).
 * Dynamic DNS:
   * [heartbeat](https://www.mirbsd.org/cvs.cgi/contrib/code/heartbeat/) ([sobre](https://www.mirbsd.org/permalinks/wlog-10_e20130520-tg.htm#e20130520-tg_wlog-10)).
   * With nsupdate: [1](http://linux.yyz.us/nsupdate/), [2](http://linux.yyz.us/dns/ddns-server.html), [3](http://caunter.ca/nsupdate.txt), [4](http://www.rtfm-sarl.ch/articles/using-nsupdate.html), [5](https://github.com/skx/dhcp.io/).
@@ -184,6 +185,13 @@ Office
 * [eConvenor | Activists, get organised](https://econvenor.org/).
 * [MindMup](https://github.com/mindmup).
 * [Cryptpad](https://beta.cryptpad.fr/).
+* [Timestrap: time tracking and invoicing](https://github.com/overshard/timestrap).
+
+Conferences
+-----------
+
+* [EasyChair Smart CFP](https://easychair.org/cfp/).
+* [frab - conference management system](https://frab.github.io/frab/) with [ANGELSYSTEM - online tool for coordinating helpers and work shifts on large events](https://engelsystem.de/index_en.html).
 
 URL shorteners
 --------------