Well there are few others that are not listed by others (I'll put them down below) but wanted you to know, from someone who also offers his service on this forum and have tried on few others, this forum is the best place for you to offer.

http://bitgigs.com/
https://paidbitcoin.com/login
https://www.reddit.com/r/Jobs4Bitcoins/
https://bitify.com/section/web-development/
https://bitify.com/section/application-development/
http://www.peopleperbitcoin.com/